Please report any broken links or trouble you might come across to the Webmaster.
Please take a moment to let us know so that we can correct any problems and make your visit as enjoyable and as informative as possible.

CLASS: A
Design Designator EB7H

Class consists of six ships, USS A-1 (SS-2) to USS A-7 (SS-8); A-1, A-2, A-4, A-6, A-7 built at Crescent Shipyard, Elizabethport, NJ, A-3, A-5 built at Union Iron Works, San Francisco, CA

Physical Characteristics:

Length (feet) 63.8; Beam (feet) 11.7

Displacement (tons), Surfaced/Submerged 107/123

Speed (knots), Surfaced/Submerged 8/5

Endurance (nautical miles/speed), Surfaced: Submerged: 4 hrs

Design Test Depth (feet) 150

Personnel Complement (officer/enlisted) 1/6

Sensor Systems:

Sonar System(s) None

Fire Control Systems; Manual

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell

Periscope(s); K&E (F) installed with new conning tower

Armament:

Torpedo Tubes (s) One 11'-8" by 18" diameter

Engineering:

Number of main shafts; 1,

Main Engines; Number, 1, Manufacturer Otto, Type Gasoline, Model  

Propulsion control type;  Knife switches and field rheostats

Main Motor; Number  1, Manufacturer Ele. Dyn., Horsepower  150

Battery: 1 battery of 60 cells, Manuf. Electric Storage Battery (replaced after 1904 with Gould), Capacity 1730 amps at 3 hour discharge rate, Model 23-W Manchester type

Remarks, All ships had "fish" names until 17 November 1911, A-1 Plunger, A-2 Adder, A-3 Grampus, A-4 Moccasin, A-5 Pike, A-6 Porpoise, A-7 Shark. 
Ships with exception of Plunger sent to Manila Bay, there they received periscopes, revised bow fairing and other test items.   

CLASS: C
Design Designator EB17

Class consists of five ships, USS C-1 (SS-9), USS C-2 (SS13, USS C-3 (SS-14), USS C-4 (SS-15), USS C-5 (SS-16); all built at Fore River Shipbuilding Co, Quincy, MA.

Physical Characteristics:

Length (feet) 105.3; Beam (feet) 13.9

Displacement (tons), Surfaced/Submerged 238/275

Speed (knots), Surfaced/Submerged 10.5/9

Endurance (nautical miles/speed), Surfaced: Submerged 776/8:24/8

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 1/14

Sensor Systems:

Sonar System(s) None

Fire Control Systems; Manual

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell

Periscope(s); 1x Galileo (#38)

Armament:

Torpedo Tubes (s) Two tubes 17'4"by 18" diameter

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer, Type Gasoline, Model  

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  500

Battery:  1 battery of 120 cell each, Manuf. Edison, Capacity 2550 amps at 3 hour discharge rate, Model 23-W (alkaline battery)

Remarks: Ships also had 'fish' names until 17 November 1911; C-1 Octopus, C-2 Stingray, C-3 Tarpon, C-4 Bonita, C-5 Snapper.

CLASS: B
Design Designator EB16A

Class consists of three ships, USS B-1  (SS-10), USS B-2, (SS-11) USS B-3 (SS-12); built at Fore River Shipbuilding Co, Quincy, MA

Physical Characteristics:

Length (feet) 82.4;  Beam (feet) 12.5

Displacement (tons), Surfaced/Submerged 145/173

Speed (knots), Surfaced/Submerged 9/8

Endurance (nautical miles/speed), Surfaced: Submerged 600/?

Design Test Depth (feet) 150

Personnel Complement (officer/enlisted) 1/9

Sensor Systems:

Sonar System(s) None

Fire Control Systems; Manual

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell

Periscope(s); EB (W) replaced by Goerz (W) #11

Armament:

Torpedo Tubes (s) Two 17'4" by 18" diameter

Engineering:

Number of main shafts; 1,

Main Engines; Number, 2, Manufacturer Otto, Type Gasoline, Model  

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  150

Battery: 1 battery of 60 cells each, Manuf. Electric Storage Battery Co, Capacity 2550 amps at 3 hour discharge rate, Model 23-W

Remarks: Ships also had 'fish' names B-1 Viper, B-2 Cuttlefish, B-3 Tarantula.  Names were changed to letter designations on 17 November 1911.

CLASS: D
Design Designator EB12A

Class consists of three ships, USS D-1 (SS-17), USS D-2 (SS-18), USS D-3 (SS-19); all were built at Fore River Shipbuilding Co, Quincy, MA

Physical Characteristics:

Length (feet) 134.8; Beam (feet) 13.9

Displacement (tons), Surfaced/Submerged 288/337

Speed (knots), Surfaced/Submerged 13/9

Endurance (nautical miles/speed), Surfaced: Submerged 1179/9.6:24/8

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 1/14

Sensor Systems:

Sonar System(s) None

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s);  2xEB (#26-31 group) (F) #1,#36

Armament:

Torpedo Tubes: Two tubes 17'4" by 18" dia.

Engineering:

Number of main shafts; 2, Main Engines; Number, 2, Manufacturer, Type Gasoline, Model  

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  300

Battery: 1 battery of 120 cells each, Manuf. Electric Storage Battery Co., Capacity 2970 amps at 3-hour discharge rate, Model 23-WL.

CLASS: G-1
Design Designator LAKE

Class consists of one ship, USS G-1 (SS-19.5); built at Newport News Shipbuilding & Drydock Co., Newport News, VA

Physical Characteristics:

Length (feet) 161;  Beam (feet) 13.1

Displacement (tons), Surfaced/Submerged 400/516

Speed (knots), Surfaced/Submerged 14/10

Endurance (nautical miles/speed), Surfaced: Submerged 3500:24/8

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 1/23

Sensor Systems:

Sonar System(s) Y-tube/K-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); Lake Omniscope; #2 was at one time Goertz (#45)

Armament:

Torpedo Tubes Two 17'5" long by 18" dia; Four 17'4"long by 18" diameter tubes in two center pivot trainable mounts in the superstructure.

Engineering:

Number of main shafts; 2,

Main Engines; Number, 4, Manufacturer White/Middleton, Type Gasoline, Model  

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number 2, Manufacturer Ele. Dyn., Horsepower  300

Battery: 2 batteries of 120 cells each, Manuf. Gould, Capacity?  Model 25

Remarks: Redisignated SS-20 after the loss of F-1 (not in all correspondence) also known as USS Seal.

CLASS: F
Design Designator EB20B

Class consists of four ships, USS F-1 (SS-20), USS F-2 (SS-21), USS F-3 (SS-22), USS F-4 (SS-23); 
F-1 and F-2 were built at Union Iron Works, San Francisco, CA; F-3 and F-4 were built at Seattle Construction and Drydock Co., Seattle, WA.

Physical Characteristics:

Length (feet) 143;  Beam (feet) 15

Displacement (tons), Surfaced/Submerged 350/435

Speed (knots), Surfaced/Submerged 13.5/11.5

Endurance (nautical miles/speed), Surfaced: Submerged 2500/11:25.5/8.5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 1/21

Sensor Systems:

Sonar System(s) Y-tube/K-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); 2x EB 4" dia (#49-56 group) (W) Replaced by K&E (#163-166,186,187 groups)

Armament:

Torpedo Tubes Two 17'4" by 18" dia.

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO/ Vickers Licence, Type Diesel, Model  240-V8FS

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  620

Battery: 2 batteries of 120 cells each, Manuf. Edison and Electric Storage Battery Company, Capacity?,  Model 27-WL

Remarks:  Ships also had 'fish' names, F-1 Carp, F-2 Barracuda, F-3 Pickerel, F-4 Skate.

CLASS: E
Design Designator N/A
Class consists of two ships, USS E-1 (SS-24); and USS E-2 (SS-25) built at Fore River Shipbuilding Co, Quincy, MA.

Physical Characteristics:

Length (feet) 158;  Beam (feet) 17.5

Displacement (tons), Surfaced/Submerged 360/457

Speed (knots), Surfaced/Submerged 14/11.5

Endurance (nautical miles/speed), Surfaced: Submerged 2090/10:27/9

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 1/23

Sensor Systems:

Sonar System(s) Y-tube/K-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); 2x EB 4" dia (#32-35 group); #1 37 (W); Replaced by K&E (#146)

Armament:

Torpedo Tubes: Four 17'4" by 18" dia.

Remarks: Both ships also had 'fish' names, E-1 Skipjack, E-2 Sturgeon. 

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO/ Vickers Licence, Type Diesel, Model 50/6

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number 2, Manufacturer Diehl., Horsepower  440

Battery: 1 battery of 120 cells each, Manuf. Edison,  Capacity 3180 amps at 3 hour discharge rate, Model 25-WL. 
This was the last of the alkaline batteries used because of the E-2 battery explosion. The E-class batteries were replaced by Gould batteries.

CLASS: G-4
Design Designator LAURENTI

Class consists of G-4 Thrasher SS-26; built at Cramp Shipbuilding Co., Philadelphia, PA

Physical Characteristics:

Length (feet) 158; Beam (feet) 17.5

Displacement (tons), Surfaced/Submerged 360/457

Speed (knots), Surfaced/Submerged 14/9.5

Endurance (nautical miles/speed), Surfaced: Submerged 2200/8:24/8

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 1/23

Sensor Systems:

Sonar System(s) Y-tube/K-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); Queen-Gray (2) then replaced by K&E

Armament:

Torpedo Tubes (s) 4x5.2m

Engineering:

Number of main shafts; 2 Main Engines; Number, 4, Manufacturer Fiat, Type Diesel, Model  

Propulsion control type; Knife switches and field rheostats

Main Motors; Number 2, Manufacturer Diehl., Horsepower  440

Battery:1 battery of 169 cells, Manuf. ?,  Capacity 7176 amps at 3 hour discharge rate, Model 27

CLASS: G-2
Design Designator LAKE

Class consists of G-2 Tuna SS-27; built at Newport News Shipbuilding & Drydock Co., Newport News, VA

Physical Characteristics:

Length (feet) 161; Beam (feet) 16

Displacement (tons), Surfaced/Submerged 300/516

Speed (knots), Surfaced/Submerged 14/10.5

Endurance (nautical miles/speed), Surfaced: Submerged 25.5/8.5:3500

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 1/23

Sensor Systems:

Sonar System(s) Y-tube/K-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Four 17'4" by 18" dia.

Engineering:

Number of main shafts; 2, Main Engines; Number, 4, Manufacturer White/Middleton, Type Gasoline, Model  

Propulsion control type; Knife switches and field rheostats

Main Motors; Number 2, Manufacturer Diehl., Horsepower  520

Battery: 2 batteries of120 cells each, Manuf.?,  Capacity 3840 amps at 3 hour discharge rate, Model 25

CLASS: H
Design Designator EB26A

Class consists of nine ships in two separate groups.  The first is from USS H-1  (SS-28) through USS H-3 (SS-30); the second is from USS H-4 (SS-147) to H-9 (SS-152);
H-4 through H-9 were built at Puget Sound Naval Shipyard, Bremerton, WA H-1 and H-2 were built at Union Iron Works, San Francisco, CA, H-3 was built at Seattle Construction and Drydock Co., Seattle, WA.

Physical Characteristics:

Length (feet) 150;  Beam (feet) 16

Displacement (tons), Surfaced/Submerged 358/467

Speed (knots), Surfaced/Submerged 14/10.5

Endurance (nautical miles/speed), Surfaced: Submerged 2500:25.5/8.5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/23

Sensor Systems:

Sonar System(s) Y-tube/K-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); 2x EB (#61-66 group) replaced by #147-152 (W)

Armament:

Torpedo Tubes (s) Four 17'4" by 18" dia.

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model  75/6 HS

Propulsion control type; Knife switches and field rheostats

Main Motors; Number 2, Manufacturer Ele. Dyn., Horsepower  600

Battery: 2 batteries of 120 cells each, Manuf.Exide and Gould, Capacity 3800 amps at 3 hour discharge rate, Model 25-WL

CLASS: G-3
Design Designator LAKE

Class consists of one ship, USS G-3 (SS-31); built at Lake Torpedo Boat Company, Bridgeport, CT

Physical Characteristics:

Length (feet) 161; Beam (feet) 16

Displacement (tons), Surfaced/Submerged 300/460

Speed (knots), Surfaced/Submerged 14/9.5

Endurance (nautical miles/speed), Surfaced: Submerged:

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/23

Sensor Systems:

Sonar System(s) Y-tube/K-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Six 17'4" by 18" dia.

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer Sulzer, Type Diesel, Model 6U32 (Note: Engines built in Winterthur, Switzerland)  

Propulsion control type; Knife switches and field rheostats

Main Motors; Number 2, Manufacturer Ele. Dyn., Horsepower  600

Battery: 2 batteries of 120 cells each, Manuf.Gould, Capacity 8hr rate 4200 amps at 3 hour discharge rate, Model 25

CLASS: K
Design Designator EB30B

Class consists of eight ships, USS K-1 (SS-32) through USS K-8 (SS-39); built at Fore River Shipbuilding Co, Quincy, MA.
(K-1, K-2); Seattle Construction and Drydock, Seattle, WA, (K-4); Union Iron Works, San Francisco, CA (K-3, K-5, K-6) 

Physical Characteristics:

Length (feet) 153.6; Beam (feet) 16.7

Displacement (tons), Surfaced/Submerged 392/521

Speed (knots), Surfaced/Submerged 14/10.5

Endurance (nautical miles/speed), Surfaced: Submerged 3150/8.5:25.5/8.5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/26

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); 2x EB (#69-84 group)

Armament:

Torpedo Tubes (s) Six 17'4" by 18" dia.

Engineering:

Number of main shafts; 2, Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model  75/6 HS

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  680

Battery: 2 batteries of 120 cells each, Manuf.Gould or Exide (pasted plate), Capacity 4000 amps at 3 hour discharge rate, Model 49-WL.

CLASS: L
Design Designator EB37G and Lake Design

Class consists of two groups; the first being USS L-1 (SS-40) through USS L-4 (SS-43) and USS L-9 (SS-49) through USS L-11(SS-51),built at Fore River Shipbuilding Co, Quincy, MA;
The second group consists of USS L-8, the first submarine built at Portsmouth Naval Shipyard, Kittery, ME; and USS L-5 (SS-55) through USS L-7 (SS-46) built at Lake Torpedo Boat Co, Bridgeport, CT (L-5) and Crescent Shipyard, Elizabethport, NJ (L-6, L-7). 

Physical Characteristics:

Length (feet) 167; Beam (feet) 17.5

Displacement (tons), Surfaced/Submerged 450/548

Speed (knots), Surfaced/Submerged 14/10.5

Endurance (nautical miles/speed), Surfaced: Submerged 3150/8.5:25.5/8.5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/26

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); 2x EB (#89-96 and 114-119 groups); Grubb (#514)

Armament:

Torpedo Tubes (s) Four 17'4" by 18" dia.

Engineering:

Number of main shafts; 2

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model 75/6 HS

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number 2, Manufacturer Ele. Dyn., Horsepower  680

Battery: 2 batteries of 120 cells each, Manuf.Gould or Exide (pasted plate), Capacity 4150 amps at 3 hour discharge rate, Model 27-Wl.

CLASS: M
Design Designator EB39E

Class consists of one ship, USS M-1 (SS-47); built at Fore River Shipbuilding Co, Quincy, MA

Physical Characteristics:

Length (feet) 196; Beam (feet) 16

Displacement (tons), Surfaced/Submerged 488/676

Speed (knots), Surfaced/Submerged 14/10.5

Endurance (nautical miles/speed), Surfaced: Submerged 2400:25.5/8.5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/26

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Four 17'4" by 18" dia.

Deck Gun(s) 1x3"MkIX

Engineering:

Number of main shafts; 2, Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model 70/6 MS

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  680

Battery: 2 batteries of 120 cells each, Manuf.Gould or Exide (pasted plate), Capacity 4500 amps at 3 hour discharge rate, Model 29-U.

CLASS: T
Design Designator EB63A

Class consists of three ships, USS T-1  (Schley AA-1) (SS-52), USS T-2 (SS-60) and USS T-3 (SS-61); built at Fore River Shipbuilding Co, Quincy, MA

Physical Characteristics:

Length (feet) 269;  Beam (feet) 22.5

Displacement (tons), Surfaced/Submerged 1106/1482

Speed (knots), Surfaced/Submerged 20/10.5

Endurance (nautical miles/speed), Surfaced: Submerged 3000/14:100/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/50

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Four 17’4" x 18"  (T-1 had two trainable deck tubes of 17’4" x 18" size)

Deck Gun(s) 1x4"/50 (T-1 had two 3"/23 MkIX, but they were replaced.

Engineering:

Number of main shafts; 2,

Main Engines; Number, 4, Manufacturer NELSECO, Type Diesel, Model 6-EB-19

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  675

Battery: 2 batteries of 120 cells each, Manuf. Gould or Exide (pasted plate),  Capacity 155 KWH, Model 27-WL

CLASS: N
Design Designator EB61B (N-1 to N-3) and Lake (N-4 to N-7)

Class consists of seven ships in two groups. USS N-1 (SS-53) through USS N-3 (SS-55); built at Seattle Construction and Drydock Company, Seattle, WA.
USS N-4 (SS-56) through N-7 (SS-59) at Lake Torpedo Boat Co., Bridgeport, CT.

Physical Characteristics:

Length (feet) 147;  Beam (feet) 16

Displacement (tons), Surfaced/Submerged 348/414

Speed (knots), Surfaced/Submerged 13/11

Endurance (nautical miles/speed), Surfaced: Submerged 3500/11:30/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/26

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/Signal Bell/Fessenden Oscillator

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Four 17'4" by 18". dia.

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model 240 V8 FS

Propulsion control type;  Enclosed Switches and Field Rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  280

Battery: 2 batteries of 120 cells each, Manuf. Exide, Capacity 2970 amps at 3 hour discharge rate, Model Type 37

CLASS: O-1
Design Designator EB68A

Class consists of sixteen ships in four groups: O-1 (SS-62) built at Portsmouth Naval Shipyard, Kittery, ME,
O-2 (SS-63) built at Puget Sound Naval Shipyard;
O-3 (SS-64) through O-10 (SS-71) built at Fore River Shipbuilding Company, Quincy, MA;
O-11 (SS-72) through O-16 (SS-77), built at Lake Torpedo Boat Company, Bridgeport, CT.

Physical Characteristics:

Length (feet) 172;  Beam (feet) 18

Displacement (tons), Surfaced/Submerged 520/629

Speed (knots), Surfaced/Submerged 14/10.5

Endurance (nautical miles/speed), Surfaced: Submerged :

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/27

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/CW and Voice radio/Fessenden Oscillator

Periscope(s); Unknown

Armament:

Torpedo Tubes (s)  4x21"

Engineering:

Number of main shafts; 2, Main Engines; Number, 2, Manufacturer, Type, Model  

Propulsion control type; Enclosed Switches and Field Rheostats

Main Motors; Number  2, Manufacturer NYNY., Horsepower  370

Battery: 2 batteries of 120 cells each, Manuf. Gould or Exide (pasted plate),  Capacity ?, Model ?

CLASS: R-1
Design Designator EB77A-a (R-1 to R-20) and Lake (R-21 to R-27)

Class consists twenty-seven ships in two groups: R-1 (SS-78) through R-20 (SS-97) built at Fore River Shipbuilding Co, Quincy, MA;
R-21 (SS-98) through R-27 (SS-104) built at Lake Torpedo Boat Company, Bridgeport, CT .

Physical Characteristics:

Length (feet) 186; Beam (feet) 18

Displacement (tons), Surfaced/Submerged 569/680

Speed (knots), Surfaced/Submerged 14/10.5

Endurance (nautical miles/speed), Surfaced: Submerged 4700/6.2:

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/27

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual

Communication System(s); Visual Signal/CW and Voice radio/Fessenden Oscillator

Periscope(s); 3 (until 1924 then )2x K (#273-332 group)

Armament:

Torpedo Tubes (s) 4x21"

Deck Gun(s) 1x3"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model  6-EB-14 NR

Propulsion control type; Enclosed Switches and Field Rheostats

Main Motors; Number 2, Manufacturer Ele. Dyn., Horsepower  467

Battery: 2 batteries of 120 cells each, Manuf.Gould or Exide (pasted plate),  Capacity, Model 29-WL.

CLASS: S-1
Design Designator EB73A

Class consists of one ship, the USS S-1 (SS-105); built at Fore River Shipbuilding Co., Quincy, MA.

Physical Characteristics:

Length (feet) 219'-3";  Beam (feet) 20'-8"

Displacement (tons), Surfaced/Submerged 854/1062

Speed(knots), Surfaced/Submerged 14.5/11

Endurance (nautical miles/speed), Surfaced: Submerged (Spec. 5500/14.5):40/8

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule/Electric tube firing

Navigation System(s); Visual

Communication System(s); Visual Signal/CW and Voice radio/ Fessenden Oscillator

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) 4 x 21" Bow, Air ejection.

Deck Gun(s) 3"/23 Mk IX replaced by  1x4"/50

Aircraft in watertight hanger tried as an experiment in 1920.

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel (4 cycle), Model  8-EB-15 NR

Propulsion control type; Enclosed Switches and Field Rheostats

Main Motors; Number 2 , Manufacturer Ele.Dyn., Horsepower  500  

Battery:  2 batteries of  60 cells each, Manuf.Gould or Exide (pasted plate), Capacity 1460 KWH, Model 49-UL

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: S-2
Design Designator LAKE

Class consists of one ship, the USS S-2 (SS-106); built at Lake Torpedo Boat Company, Bridgeport, CT.

Physical Characteristics:

Length (feet) 207' - 7";  Beam (feet) 19' - 7"

Displacement (tons), Surfaced/Submerged 800/977

Speed (knots), Surfaced/Submerged 15/9

Endurance (nautical miles/speed), Surfaced: Submerged

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/K-tube/ MV Array

Fire Control Systems; Manual/Slide Rule/Electric tube firing

Navigation System(s); Visual

Communication System(s); Visual Signal/CW and Voice radio (Bureau installed)/ Fessenden Oscillator

Periscope(s); Three, #2 is an altiscope.

Armament:

Torpedo Tubes (s) 4 x 21" Bow, Air ejection

Deck Gun(s) 1x4"/50

Engineering:

Number of main shafts; 2, Main Engines;

    Number, 2, Manufacturer Busch-Sulzer, Type Diesel (2 cycle), Model  6M150, 900 HP at 350 RPM

Propulsion control type;  Main Contactor Panel in motor room with control in COC

Main Motors; Number 2, Manufacturer Diehl., Horsepower 500(Single Armature and Field) 

Battery:  2 batteries of  60  cells each, Manuf.Gould,  Capacity 970 KWH, Model ?

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: S-3
Design Designator: Bureau of Construction and Repair, Portsmouth Naval Shipyard

Class consists of one ship, the USS S-3 (SS-107); built at Portsmouth Naval Shipyard, Kittery, ME

Physical Characteristics:

Length (feet) 231; Beam (feet) 21.8

Displacement (tons), Surfaced/Submerged 875/1088

Speed (knots), Surfaced/Submerged 15/10.9

Endurance (nautical miles/speed), Surfaced: Submerged (Spec. 5500/14.5): 20hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule/ Electric tube firing

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s);  #1, 50KA-30

Armament:

Torpedo Tubes (s) Four 22' by 21" Bow, Air ejection

Engineering:

Number of main shafts; 2, Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model  8-EB-16

Propulsion control type; Enclosed Switches and Field Rheostats (Switchboard in motor room, control in COC)

Main Motors; Number 2, Manufacturer Westinghouse., Horsepower 510 at 260 RPM V (Double Armature and Field)  

Battery:  2 batteries of  60 cells each, Manuf.Gould,  Capacity 1240 KWH, Model 35-U

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: S-4
Design Designator: Bureau of Construction and Repair, Portsmouth Naval Shipyard

Class consists of six ships, USS S-4 (SS-109) through USS S-9 (SS-114); all built at Portsmouth Naval Shipyard, Kittery, ME. Similar to but not the identical to S-3

Physical Characteristics:

Length (feet) 231; Beam (feet) 21.8

Displacement (tons), Surfaced/Submerged 876/1092

Speed (knots), Surfaced/Submerged 15/11

Endurance (nautical miles/speed), Surfaced: Submerged (Spec. 5500/14.5):20hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/SC-tube

Fire Control Systems; Manual/Slide Rule/ Electric tube firing

Navigation System(s); Visual/RDF (after 1940)

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); #1, 50KA-30 (#1 tested 1924 20GA-23)

Armament:

Torpedo Tubes (s) Four 22' by 21" Bow, Air ejection

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSCO, Type Diesel 4 cycle, Model  

Propulsion control type;  Woodward

Main Motors; Number , Manufacturer West.., Horsepower 

Battery:  2 batteries of  60 cells each, Manuf.Gould,  Capacity 1240 KWH, Model 35-U

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: S-10
Design Designator: Bureau of Construction and Repair, Portsmouth Naval Shipyard Design of November 1918. 
Generally the same as the S-4 class but with a single stern torpedo tube.

Class consists of four ships, USS S-10 (SS-115) through USS S-13 (SS-118)  

Physical Characteristics:

Length (feet) 231; Beam (feet) 21' 10"

Displacement (tons), Surfaced/Submerged 930/1138

Speed (knots), Surfaced/Submerged 15/11

Endurance (nautical miles/speed), Surfaced: Submerged (Spec. 5500/14.5): 20hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/SC-tube

Fire Control Systems; Manual/Slide Rule/Electrical tube firing

Navigation System(s); Visual/RDF (after 1940)

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); #1, 50KA-30 (#1  tested 1924 20GA-23)

Armament:

Torpedo Tubes (s) Four 22' by 21" Bow, Air ejection One 22' by 21" Stern, Air ejection

Deck Gun(s) One x 4"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer, Type Diesel, Model  

Propulsion control type;  Enclosed Switches and Field Rheostats (Switchboard in motor room, control in COC)

Main Motors; Number  2, Manufacturer Westinghouse, Horsepower 500@350 RPM 

Battery:   2 batteries of  60 cells each, Manuf.Gould or Exide (pasted plate) Capacity 1240 KWH, Model 35-U

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: Neff

Class consists of Sub of California (assigned hull number SS-108), which was proposed and was designed to have a hydrogen peroxide engine.  It was never built.

CLASS: S-14
Design Designator: Bureau of Construction and Repair, Portsmouth Naval Shipyard

in General Order #297 of 18 May 1917. Class consists of  4 ships, USS S-14 (SS-119) through USS S-17 (SS-122); built at Lake Torpedo Boat Company, Bridgeport, CT

Physical Characteristics:

Length (feet) 231;  Beam (feet) 21.6

Displacement (tons), Surfaced/Submerged 790/1092

Speed (knots), Surfaced/Submerged 15/11

Endurance (nautical miles/speed), Surfaced: Submerged 5500/11:20hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 2/23

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube/ JP (after 1940)

Fire Control Systems; Manual/Slide Rule/Electrical tube firing

Navigation System(s); Visual

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) 4 x 21" Bow, Air ejection

Deck Gun(s) 1x4"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer Busch Sulzer, Type Diesel 4 cycle, Model  

Propulsion control type;  Enclosed Switches and Field Rheostats (Switchboard in motor room, control in COC)

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  750@340 RPM

Battery:  2 batteries of 60 cells each, Manuf.Gould or Exide (pasted plate), Capacity 1240 KWH, Model 35-U

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: S-18
Design Designator EB73C

Class consists of 24 ships, USS S-18 (SS-123) through USS S-41 (SS-146);
S-18 through S-29 built at Fore River Shipbuilding Co, Quincy,
MA; S-30 through S-41 built at Bethlehem Shipbuilding, Union Plant, Potrero Works, San Francisco, CA

Physical Characteristics:

Length (feet) 219.2;  Beam (feet) 20.7

Displacement (tons), Surfaced/Submerged 854/1062

Speed (knots), Surfaced/Submerged 14.5/11

Endurance (nautical miles/speed), Surfaced: Submerged 5500/11:20hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule/Electrical tube firing

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); #1, 20KS-23; #2, 40KA-27; #3 10KL-27

Armament:

Torpedo Tubes (s) Four 22' by 21" Bow, Air ejection

Deck Gun(s) 1x4"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model 8-EB-15 NR

Propulsion control type; 

Main Motors; Number  2, Manufacturer Ridgeway., Horsepower  750

Battery: 2 batteries of 60 cells each, Manuf.Gould or Exide (pasted plate), Capacity 1460 KWH, Model 35-U

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: H
Design Designator EB26B

Class consists of six ships, USS H-4 (SS-147) through USS H-9 (SS-151); built at Puget Sound Naval Shipyard, Bremerton, WA

Physical Characteristics:

Length (feet) 225;  Beam (feet) 19.5

Displacement (tons), Surfaced/Submerged 990/1126

Speed (knots), Surfaced/Submerged 14/10

Endurance (nautical miles/speed), Surfaced: Submerged:

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Four 22' by 21" Bow, Air ejection

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model 75/6 HS

Propulsion control type;  Knife switches and field rheostats

Main Motors; Number  2, Manufacturer Ele. Dyn., Horsepower  600

Battery: 2 batteries of 120 cells each, Manuf.Exide and Gould, Capacity 3800 amps at 3 hour discharge rate, Model 25-WL

CLASS: S-42
Design Designator EB73F (Modifications to EB73C).

Class consists of six ships, USS S-42 (SS-153) through USS S-47 (SS-158); built at Fore River Shipbuilding Co, Quincy, MA

Physical Characteristics:

Length (feet) 225;  Beam (feet) 19.5

Displacement (tons), Surfaced/Submerged 963/1135

Speed (knots), Surfaced/Submerged 14.5/11.5

Endurance (nautical miles/speed), Surfaced: Submerged 2510/6.5:20hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/39

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Four 22' by 21" Bow, Air ejection

Deck Gun(s) 1x4"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer NELSECO, Type Diesel, Model 8-EB-15 NR

Propulsion control type; 

Main Motors; Number  2, Manufacturer Ele.Dyn., Horsepower  750

Battery:  2 batteries of 60 cells each, Manuf., Capacity 9500 amps at 3 hour discharge rate, Model

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: S-48
Design Designator Bureau of Construction and Repair, Portsmouth Naval Shipyard

Class consists of four ships, USS S-48 (SS-159) through USS S-51 (SS-162); built at Lake Torpedo Boat Company, Bridgeport, CT

Physical Characteristics:

Length (feet) 240; Beam (feet) 21.5

Displacement (tons), Surfaced/Submerged 990/1230

Speed (knots), Surfaced/Submerged 14.5/11

Endurance (nautical miles/speed), Surfaced: Submerged 5900/11:20hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 4/34

Sensor Systems:

Sonar System(s) Y-tube/K-tube/C-tube/Supersonic (S-49, 50 used as trials for supersonic active sonars at frequencies above 15kHz using quarter-second pulses.

Fire Control Systems; Manual/Slide Rule/Electrical tube firing

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 10DA-30 (#3 scope)

Armament:

Torpedo Tubes (s) Four 22' by 21" Bow, Air ejection, One 22' by 21" Stern, Air ejection

Deck Gun(s) 1x4"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer Busch-Sulzer, Type Diesel 2 cycle, Model 6M150

Propulsion control type; 

Main Motors; Number  2, Manufacturer Ridgway., Horsepower  750

Battery: 2 batteries of 60 cells each, Manuf. Gould or Exide, Capacity 1240 KWH, Model 35-U

Steering: Electric (Hand backup) Bridge, Conning Tower, Control Room

Dive Planes: Electric (Hand backup) Control Room

CLASS: Barracuda
Design Designator Bureau of C&R (preliminary), Portsmouth Naval Shipyard (detailed).

Class consists of three ship, USS Barracuda (SS-163), USS Bass (SS -164), USS Bonita (SS-165); built at Portsmouth Naval Shipyard, Kittery, ME

Physical Characteristics:

Length (feet) 342; Beam (feet) 27.5

Displacement (tons), Surfaced/Submerged 2000/2620

Speed (knots), Surfaced/Submerged 21/8

Endurance (nautical miles/speed), Surfaced: Submerged 6000/11:10hrs/5

Design Test Depth (feet) 200

Personnel Complement (officer/enlisted) 6/50

Remarks: Also known as V-1 Class

Sensor Systems:

Sonar System(s) C-tube, JP and WFA (later)

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Three

Armament:

Torpedo Tubes (s) Six 22’ x 21" (four bow, two stern) All removed in 1943 conversion

Deck Gun(s) One 5"/51 (replaced with 3"/50 in 1923

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer Busch-Sulzer, Type Diesel, Model 6M375

Main Engines were replaced with two MAN Four cycle diesels 

Propulsion control type; GE Electro-pneumatic

Main Motors; Number  2, Manufacturer Elliot (repl by Ridgeway)., Horsepower  1200

Battery: 2 batteries of 60 cells each, Manuf.?  Capacity? Model?

CLASS: Argonaut
Design Designator Bureau of Construction and Repair (Preliminary) and Portsmouth Naval Shipyard (Detail); Class consists of one ship, USS Argonaut SS-166; built at Portsmouth Naval Shipyard, Kittery, ME

Physical Characteristics:

Length (feet) 381; Beam (feet) 33.5

Displacement (tons), Surfaced/Submerged 3128/4164

Speed (knots), Surfaced/Submerged 15/10

Endurance (nautical miles/speed), Surfaced: Submerged 8000/10:10hrs/5

Design Test Depth (feet) 300

Personnel Complement (officer/enlisted) 8/80

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Three

Armament:

Torpedo Tubes (s) Four 22’x21" (bow) (Two deck 22’x21" added 1942)

Deck Gun(s) Two 6"/53 Mark XII Mod 2

Mines could carry up to 60 MK XI and launch through two 40" dia stern tubes  (all removed 1942)

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer MAN, Type Diesel, Model  

Note: Re-engined in 1942 with General Motors 12-258S

Propulsion control type; Ridgeway Manual

Main Motors; Number  2, Manufacturer Ridgway., Horsepower  1100

Battery: 2 batteries of 120 cells each, Manuf. Exide,  Capacity ?, Model ?

CLASS: Narwhal
Design Designator GOVT

Class consists of two ships, USS Narwhal  (SS-167) and USS Nautilus (SS-168); built at Portsmouth Naval Shipyard, Kittery, ME

Physical Characteristics:

Length (feet) 371; Beam (feet) 33.3

Displacement (tons), Surfaced/Submerged 3128/4023

Speed (knots), Surfaced/Submerged 17/10

Endurance (nautical miles/speed), Surfaced: Submerged 8000/10:10hrs/5

Design Test Depth (feet) 300

Personnel Complement (officer/enlisted) 8/80

Remarks: Also known as V-5 Class, Also known as N Class, Also known as SC-1 and SC-2.

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Unknown

Armament:

Torpedo Tubes Six 22’ x 21" (4 bow, 2 stern)
In 1941 Nautilus and Narwhal received four additional tubes, two under superstructure just forward of bridge and two under after deck gun.
On Nautilus, in 1943,  the forward deck tubes were relocated nearer the bow in the superstructure. Narwhal, in 1942, got two additional tubes forward near the bow and two aft near stern.
The forward tubes under the bridge were removed and the aft tubes under the deck gun were retained for pressure tight storage containers.    

Deck Gun(s)Two 6"/53 MkXII Mod 2 (Narwhal’s are at NavSubBase Groton, CT)

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer MAN, Type Diesel, Model

Note: Engines to be replaced with Fairbanks Morse but actually replaced in 1942 with GM 16-258s (Nautilus) and GM 16-278A (Narwhal) 

Propulsion control type; Westinghouse Manual

Main Motors; Number  2, Manufacturer Westinghouse., Horsepower  800

Battery: 2 batteries of 120 cells each, Manuf. ?,  Capacity ?, Model ?

CLASS: Dolphin
Design Designator Bureau of Construction and Repair

Class consists of one ship, USS Dolphin  (SS-169); built at Portsmouth Naval Shipyard, Kittery, ME

Physical Characteristics:

Length (feet) 319; Beam (feet) 27.5

Displacement (tons), Surfaced/Submerged 1718/2215

Speed (knots), Surfaced/Submerged 17/8

Endurance (nautical miles/speed), Surfaced: Submerged 4900/10:10hrs/5

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 7/56

Remarks: First boat to have W/T door in conning tower for access to gun (vice gun trunk) and last boat to have watertight windlass compartment. Also known as SC-3 (submarine cruiser, SC-1 and SC-2 were Nautilus and Narwhal respectively

Sensor Systems:

Sonar System(s) C-tube, JP and WFA

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 1x 81KA-30; 1x 80KA-34

Armament:

Torpedo Tubes (s) Six 22’x21" (four in bow, two in stern)

Deck Gun(s) One 4"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer MAN, Type Diesel, Model  

Propulsion control type; GE Manual

Main Motors; Number  2, Manufacturer Ele. Dyn.., Horsepower  875 Triple armature type, two for normal series and parallel operation and one 25 hp motor for creeping

Battery: 2 batteries of 120 cells each, Manuf. ?,Capacity ?, Model ?

CLASS: Cachalot:
Design Designator Portsmouth for 170 and EB-165A for 171 on preliminary design by BuC&R.
Class consists of two ships, USS Cachalot  (SS-170) built at Portsmouth Naval Shipyard, Kittery, ME and Cuttlefish (SS-171), built at Electric Boat Company, Groton, CT

Physical Characteristics:

Length (feet) 274; Beam (feet) 24.7

Displacement (tons), Surfaced/Submerged 1110/1650

Speed (knots), Surfaced/Submerged 17/8

Endurance (nautical miles/speed), Surfaced: Submerged 6000/10:10hrs/5

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 3/39

Remarks: Also known as V-8 Class.

Sensor Systems:

Sonar System(s) C-Tube, JP and WFA (later)

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 1x 81KA-30; 1x 80KA-34

Armament:

Torpedo Tubes (s) Six 22’x21" (four bow, two stern)

Deck Gun(s) One 3"/50 (two 20mm single mounts later in the war)

Engineering:

Number of main shafts; 2,

Main Engines; Number, 2, Manufacturer MAN, Type Diesel, Model

Engines replaced by GM 16-258 four cycle direct reversing type.  

Propulsion control type; Westinghouse Manual

Main Motors; Number  2, Manufacturer West., Horsepower  800

Battery: 2 batteries of 120 cells each, Manuf. Exide, Capacity, Model ULS37

Class: Porpoise
Design Designator

Class consists of two ships, USS Porpoise (SS-172) and USS Pike (SS-173); built at Portsmouth Naval Shipyard, Kittery, ME.

Physical Characteristics:

Length (feet) 301; Beam (feet) 25

Displacement (tons), Surfaced/Submerged 1310/1934

Speed (knots), Surfaced/Submerged 18/8

Endurance (nautical miles/speed), Surfaced: Submerged 6000/10:10hrs/5

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/45

Remarks: One of the classes that made up the P-Class (172 being the P-1 and 173 being P-2). The others in the "P-Class" were the boats of the Shark Class (174 being P-3, 175 was also called P-4) and the six boats in the Perch Class (176-181 being P-5 through P-10 respectively).

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 1x 80KA-34; 1x 86KA-34

Armament:

Torpedo Tubes (s) Six then eight (four 22'x21" bow, two 22'x21" stern then in 1942, two 22'x21" deck tubes were added

Deck Gun(s) one 3"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 4, Manufacturer Winton, Type Diesel, Model 201A

Main Engines were replaced by GM 16-278A

Propulsion control type; Westinghouse

Main Motors; Number  2, Manufacturer Elliot., Horsepower  1075

Battery: 2 batteries of 120  cells each, Manuf. ?,  Capacity ?, Model ?

Class: Shark
Design Designator: Bureau of Construction and Repair and Electric Boat Company. 

Class consists of two ships, USS Shark (SS-174) and USS Tarpon (SS-175); built at Electric Boat Company, Groton, CT

Physical  Characteristics:

Length (feet) 298; Beam (feet) 25'-1"

Displacement (tons), Surfaced/Submerged 1435/2198

Speed (knots), Surfaced/Submerged 18/8

Endurance (nautical miles/speed), Surfaced: Submerged 6000/10:10hrs/5

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/45

Remarks: One of the classes that made up the P-Class (172 being the P-1 and 173 being P-2).
The others in the "P-Class" were the boats of the Shark Class (174 being P-3, 175 was also called P-4) and the six boats in the Perch Class (176-181 being P-5 through P-10 respectively).

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Six then eight (four 22'x21" bow and two 22'x21" stern with two 22'x21" deck tubes added to 175 only in 1942)

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2,

Main Engines; Number, 4, Manufacturer Winton, Type Diesel, Model 201a

Main Engines were replaced by GM 16-278A on SS-175 only.

Propulsion control type; Westinghouse

Main Motors; Number  2, Manufacturer Elliot., Horsepower  1075

Battery: 2 batteries of 120 cells each, Manuf. Exide, Capacity ?, Model ULS39

Class: Perch
Design Designator EB186B

Class consists of six ships, USS Perch (SS-176) through USS Pompano (SS-181) SS-176, 177, 178 built at Electric Boat Company, Groton, CT; SS-179, 180 built at Portsmouth Naval Shipyard, Kittery, ME; SS-181 built at Mare Island Naval Shipyard, Vallejo, CA

Physical Characteristics:

Length (feet) 298; Beam (feet) 25

Displacement (tons), Surfaced/Submerged 1316/1968

Speed (knots), Surfaced/Submerged 18.8/8

Endurance (nautical miles/speed), Surfaced: Submerged 11000/10:10hrs/5

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/45

Remarks: One of the classes that made up the P-Class(172 being the P-1 and 173 being P-2).
The others in the "P-Class" were the boats of the Shark Class (174 being P-3, 175 was also called P-4) and the six boats in the Perch Class (176-181 being P-5 through P-10 respectively).

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3, 4/Mk-19 plotters

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Six then eight (Four 22'x21" bow, two 22'x21" stern, then two 22'x21" deck tubes added to 177 & 178 in 1942)

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2, Machinery Arrangement; E-2 (SS-176-178), E5 (SS-179,180), E3 (SS-181)

Main Engines;(on SS-176, 177,178) Number, 4, Manufacturer Winton, Type Diesel, Model 201A

Main Engines on SS-177, 178 were replaced by 16-278A GM diesels

Main Engines; (on SS-179, 180) Number, 4, Manufacturer Fairbanks Morse, Type Opposed piston diesel, Model 38A8

Main Engines on SS-179, 180 were replaced by Fairbanks Morse, 38D 8-1/8 diesels

Main Engines; (on SS-181) Number 4, Manufacturer HOR, Type Direct acting diesel, Model?

Main Engines on SS-181 were replaced by FM OP 38D 8-1/8 diesels

Propulsion control type; GE

Main Motors; Number 8, Manufacturer GE., Horsepower  538

Battery: 2 batteries of 120 cells each, Manuf. Exide, Capacity, Model WHL29B

CLASS: Salmon:
Design Designator EB209A

Class consists of six ships, USS Salmon (SS-182) through USS Sturgeon (SS-187); built at Electric Boat Company, Groton, CT,
SS-182, 183,184; Portsmouth Naval Shipyard, Kittery, ME, SS-185, 186; Mare Island Naval Shipyard, Vallejo, CA, SS-187

Physical Characteristics:

Length (feet) 308;  Beam (feet) 26

Displacement (tons), Surfaced/Submerged 1670/2198

Speed (knots), Surfaced/Submerged 21/9

Endurance (nautical miles/speed), Surfaced: Submerged 11000/10:48hrs/2

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/50

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3, 4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 2x 86KA-34

Armament:

Torpedo Tubes (s) Eight then ten  (Four 22'x21" bow, four 22'x21" stern), then two 22'x21" deck tubes added to 186 for a short time in 1942

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2,

Main Engines; (on SS-182, 183,184) Number 4, Manufacturer HOR, Type Direct acting diesel, Model?

Main Engines; (on SS-185, 186,187) Number 4, Manufacturer GM, Type Two cycle diesel, Model 248

Main Engines on SS-182, 183,184 were replaced by two cycle GM 16-278A diesels.

Propulsion control type; Cutler-Hammer

Main Motors; Number  4, Manufacturer Elliot., Horsepower  667

Battery: 2 batteries of 120 cells each, Manuf. Gould, Capacity ?, Model AMTX33HB

Nuclear Power Plant; Type N/A, Designator N/A

Class: Sargo
Design Designator EB212C

Class consists of ten ships, USS Sargo (SS-188) through USS Seawolf (SS-197); built at Electric Boat Company, Groton, CT,
SS-188, 189,190, 194, 195; Portsmouth Naval Shipyard, Kittery, ME, SS-191, 192,196,197

Physical Characteristics:

Length (feet) 311; Beam (feet) 27

Displacement (tons), Surfaced/Submerged 1900/2350

Speed (knots), Surfaced/Submerged 20/9

Endurance (nautical miles/speed), Surfaced: Submerged 11000/10:48hrs/2

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/50

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3,4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 2x 86KA-34

Armament:

Torpedo Tubes (s) Eight  (Four 22'x21" bow, four 22'x21" stern)

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2,

Main Engines; (on SS-188, 189,190) Number, 4, Manufacturer HOR, Type Diesel, Model

Main Engines on SS-188, 189,190 were replaced by GM two cycle 16-278A diesels

Main Engines; (on SS-191, 192,193) Number 4, Manufacturer GM, Type Two cycle diesel, Model 248

Propulsion control type; 

Main Motors; Number  4, Manufacturer GE., Horsepower  685

Battery:  batteries of  2 126 cells each, Manuf. Gould,  Capacity, Model AMTX33HB

CLASS: Seadragon
Design Designator BuC&R (Preliminary), Electric Boat Company (Detail EB230A)

Class consists of four ships, USS Seadragon (SS-194) through USS Seawolf (SS-197); built at Electric Boat Company, Groton, CT,
SS-194,195;  Portsmouth Naval Shipyard, Kittery, ME, SS-196,197;

Physical Characteristics:

Length (feet) 307; Beam (feet) 27

Displacement (tons), Surfaced/Submerged 1475/2370

Speed (knots), Surfaced/Submerged 20/9

Endurance (nautical miles/speed), Surfaced: Submerged 11000/10:48hrs/2

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/54

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3, 4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 2x 87KA-40

Armament:

Torpedo Tubes (s) Eight  (Four 22'x21" bow, four 22'x21" stern)

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2,

Main Engines; (on SS-194, 195) Number, 4, Manufacturer HOR, Type Diesel, Model

Main Engines on SS-194 were replaced by GM two cycle 16-278A diesels

Main Engines; (on SS-196, 197) Number 4, Manufacturer GM, Type Two cycle diesel, Model 248

Propulsion control type; 

Main Motors; Number  4, Manufacturer GE., Horsepower  1375

Battery: 2 batteries of 126 cells each, Manuf. Exide/Gould, Capacity ?, Model VLA47B

CLASS: Tambor
Design Designator EB230A

Class consists of six ships, USS Tambor (SS-198) through USS Tuna (SS-203); built at Electric Boat Company, Groton, CT, SS-198, 199,200; 
Portsmouth Naval Shipyard, Kittery, ME, SS-201, 202; Mare Island Naval Shipyard, Vallejo, CA, SS-203

Physical Characteristics:

Length (feet) 307;  Beam (feet) 27

Displacement (tons), Surfaced/Submerged 1475/2370

Speed (knots), Surfaced/Submerged 20/8

Endurance (nautical miles/speed), Surfaced: Submerged 11000/10:48hrs/2

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/54

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3,4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); 2x 87KA-40

Armament:

Torpedo Tubes (s) Ten (Six 22'x21" bow, four 22'x21" stern)

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2,

Main Engines (on SS-198, 199,200); Number, 4, Manufacturer Cleveland Diesel, Type Diesel, Model  16-258

Main Engines; (on SS-201, 202,203) Number, 4, Manufacturer Fairbanks Morse, Type Opposed piston diesel, Model 38D 8-1/8

Propulsion control type; 

Main Motors; Number  4, Manufacturer GE., Horsepower  1375

Battery:  batteries of  2 126 cells each, Manuf. Exide/Gould,  Capacity, Model VLA47B

Note: This was the start of what would become standard practice throughout the Gato, Balao and Tench classes. 
Boats built at Portsmouth Naval Shipyard to BuC&R/Portsmouth design plans (and those other yards that built to these plans [Mare Island Navy Yard, and Boston Navy Yard]) used Fairbanks Morse 9 or 10 cylinder 38D 8-1/8 OP diesels. 
Boats built at Electric Boat Company to BuC&R/EB design plans (and those other yards that built to these plans [Manitowoc Shipbuilding Company and Cramp Shipyard]) used Cleveland Diesel (GM) 248 diesels then after SS-251 Cleveland Diesel (GM) 16-278A diesels.
This engine difference along with other construction differences marked the difference between an EB-boat and a Portsmouth-boat.  Both design sets were outstanding as was the workmanship at all the yards, but the differences did set up preferences amongst the sailors for one or the other type.  

CLASS: Mackerel
Design Designator EB231A

Class consists of two ships, USS Mackerel (SS-204) and USS Marlin (SS-205); built at Electric Boat Company, Groton, CT

Physical Characteristics:

Length (feet) 239; Beam (feet) 27

Displacement (tons), Surfaced/Submerged 900/1179

Speed (knots), Surfaced/Submerged 16/8

Endurance (nautical miles/speed), Surfaced: Submerged 6500/10:

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 5/54

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3, 4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Unknown

Armament:

Torpedo Tubes (s) Ten (Six 22'x21" bow, four 22'x21" stern)

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2,;

Main Engines; Number,, Manufacturer, Type Diesel, Model  

Propulsion control type; 

Main Motors; Number  4, Manufacturer GE., Horsepower  1375

Battery:  batteries of  2 126 cells each, Manuf. Exide/Gould,  Capacity, Model VLA47B

Nuclear Power Plant; Type N/A, Designator N/A

CLASS Gar:
Design Designator EB232A

Class consists of six ships:, USS Gar (SS-206) through USS Gudgeon (SS-211) ; built at Electric Boat Company, Groton, CT,
SS-206,207,208; Portsmouth Naval Shipyard, Kittery, ME, SS-209,210; Mare Island Naval Shipyard, Vallejo, CA, SS-211

Physical Characteristics:

Length (feet) 307; Beam (feet) 27

Displacement (tons), Surfaced/Submerged 1475/2370

Speed (knots), Surfaced/Submerged 20/8.75

Endurance (nautical miles/speed), Surfaced: Submerged:

Design Test Depth (feet) 250

Personnel Complement (officer/enlisted) 4/54

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3,4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Type 1 (89KA-40/1.414), Type 2(89KA-40/1.414HA), Type 3 (89KA-40/1.99; 92KA-40T) Type 3A (92KA-30/1.9) Type 4 (93KN-36)

Armament:

Torpedo Tubes (s) Ten (Six 22'x21" bow, four 22'x21" stern)

Deck Gun(s) One 3"/50

Engineering:

Number of main shafts; 2, Machinery Arrangement; E-3 (on SS-206, 207,208); E5 (on SS-209, 210,211)

Main Engines (on SS-206, 207,208); Number, 4, Manufacturer Cleveland Diesel, Type Diesel, Model 248

Main Engines; (on SS-209, 210,211) Number, 4, Manufacturer Fairbanks Morse, Type Opposed piston diesel, Model 38D 8-1/8

Propulsion control type; 

Main Motors; Number  4, Manufacturer GE., Horsepower  1375

Battery:  batteries of  2 126 cells each, Manuf. Exide/Gould,  Capacity, Model VLA47B

CLASS: Gato:
Design Designator Bureau C&R (Preliminary), Electric Boat Company (Contract)

Class consists of seventy seven ships, starting with USS Gato SS212; built at Electric Boat Company, Groton, CT and ending with USS Tullibee (SS-284) and USS Golet (SS-361) through USS Hammerhead (SS-364).

(Construction yards are listed with the ship entry)

Physical Characteristics:

Length (feet) 307; Beam (feet) 27

Displacement (tons), Surfaced/Submerged 1475/2370

Speed (knots), Surfaced/Submerged 20/8.75

Endurance (nautical miles/speed), Surfaced: Submerged: 11000/10:48/2

Design Test Depth (feet) 300

Personnel Complement (officer/enlisted) 6/54

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3,4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Two periscopes of the following types, Type 1 (89KA-40/1.414), Type 2(89KA-40/1.414HA), Type 3 (89KA-40/1.99; 92KA-40T) Type 3A (92KA-30/1.9) Type 4 (93KN-36)

Armament:

Torpedo Tubes (s) Ten: The forward tubes, Mk 32 and Mk 33 (port and starboard) are a maximum of 250.81" effective length. The aft tubes, Mk34 and Mk35 (port and starboard) have a maximum effective length of 274.81 inches. stbd nest)

Deck Gun(s) One 3"/50 replaced on most boats with the 5"/25 or the 4"/50 .  In addition some combination of one or two 20 mm single and/or one or two 20 mm dual Oerlikon-type anti-aircraft guns and/or one or two 40 mm Bofors type anti-aircraft gun on the cut-down bridge fairwater forward or aft of the periscope shears. 

Engineering:

Number of main shafts; 2,

Main Engines (on SS-253 through 264) Number, 4, Manufacturer HOR, Type Diesel, Model ?

Main Engines (on SS-212 through 227,240 through 250, 265 through 274); Number, 4, Manufacturer Cleveland Diesel, Type Diesel, Model  248

Main Engines (on SS-251 through 252); Number, 4, Manufacturer Cleveland Diesel, Type Diesel, Model  16-278A

Main Engines; (on SS-209, 210,211) Number, 4, Manufacturer Fairbanks Morse, Type Opposed piston diesel, Model 38D 8-1/8

Main Engines on SS-253 through 264 were replaced by Cleveland Diesel (GM) 16-278A diesels.

Propulsion control type; GE/Westinghouse/Cutler Hammer

Main Motors; Number  4, Manufacturer GE/Elliot/Allis-Chalmers., Horsepower  1375

Battery:  batteries of  2 126 cells each, Manuf. Exide/Gould,  Capacity, Model VLA47B

CLASS: Balao:
Design Designator Govt

Class consists of one hundred nineteen ships from USS Balao (SS-285); built at Portsmouth Naval Shipyard, Kittery, ME to USS Tiru (SS-416)

Construction yards are listed with the individual ship entry.)

Physical Characteristics:

Length (feet) 311.7; Beam (feet) 27

Displacement (tons), Surfaced/Submerged 1870/2391

Speed (knots), Surfaced/Submerged 20.25/8.75

Endurance (nautical miles/speed), Surfaced: Submerged 11000/10:48hrs/2

Design Test Depth (feet) 400

Personnel Complement (officer/enlisted) 6/60

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3,4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Two periscopes of the following types, Type 1 (89KA-40/1.414), Type 2(89KA-40/1.414HA), Type 3 (89KA-40/1.99; 92KA-40T) Type 3A (92KA-30/1.9) Type 4 (93KN-36)

Armament:

Torpedo Tubes (s) Ten (Six 22'x21" bow, four 22'x21" stern), Mk 32 (fwd port nest), Mk 33 (fwd stbd. nest), Mk 34 (aft port nest), Mk 35 (aft stbd nest)

Deck Gun(s) One 3"/50 replaced on most boats with the 5"/25 or the 4"/50 .  In addition some combination of one or two 20 mm single and/or one or two 20 mm dual Oerlikon-type anti-aircraft guns and/or one or two 40 mm Bofors type anti-aircraft gun on the cut-down bridge fairwater forward or aft of the periscope shears. 

Engineering:

Number of main shafts; 2,

Main Engines (on SS-292 through 291,313 through 352, 361 through 378) Number, 4, Manufacturer Cleveland Diesel, Type Diesel, Model 16-278A

Main Engines; (on SS-285 through 312,381 through 416) Number, 4, Manufacturer Fairbanks Morse, Type Opposed piston diesel, Model 38D 8-1/8

Propulsion control type;  GE/Westinghouse/Cutler Hammer

Main Motors; Number  4, Manufacturer GE/Elliot/Allis-Chalmers., Horsepower  1375

Battery:  batteries of  2 126 cells each, Manuf. Exide/Gould,  Capacity, Model VLA47B

Class: Tench
Design Designator Govt

Class consists of twenty five ships, starting with USS Tench (SS-417) and ending with the USS Grenadier (SS-525). 
Eighty ships were ordered; those completed were hull numbers SS-417 to 424, and SS-435 to SS-535.  (Construction yards listed with the individual ships)

Physical Characteristics:

Length (feet) 311.8; Beam (feet) 27.1

Displacement (tons), Surfaced/Submerged 1870/2416

Speed (knots), Surfaced/Submerged 20.25/8.5

Endurance (nautical miles/speed), Surfaced: Submerged 11000/10:48hrs/2

Design Test Depth (feet) 400

Personnel Complement (officer/enlisted) 6/60

Sensor Systems:

Sonar System(s)

Fire Control Systems; Manual/Slide Rule/Mk-3,4/Mk-19 plotter

Navigation System(s); Visual/RDF

Communication System(s); Visual Signal/CW and Voice radio

Periscope(s); Two periscopes of the following types, Type 1 (89KA-40/1.414), Type 2(89KA-40/1.414HA), Type 3 (89KA-40/1.99; 92KA-40T) Type 3A (92KA-30/1.9) Type 4 (93KN-36)

Armament:

Torpedo Tubes (s) Ten (Six 22'x21" bow, four 22'x21" stern), Mk 32 (fwd port nest), Mk 33 (fwd stbd. nest), Mk 34 (aft port nest), Mk 35 (aft stbd nest)

Deck Gun(s) One 3"/50 replaced on most boats with the 5"/25 or the 4"/50 .  In addition, some combination of one or two 20 mm single and/or one or two 20 mm dual Oerlikon-type anti-aircraft guns and/or one or two 40 mm Bofors type anti-aircraft gun on the cut-down bridge fairwater forward or aft of the periscope shears. 

Engineering:

Number of main shafts; 2,

Main Engines(on SS-285 through 312,381 through 416)  Number, 4, Manufacturer Fairbanks Morse, Type Opposed piston diesel, (on SS-435 only)Model 38D 8-1/8

Main Engines; (on SS-435 only) Number, 4, Manufacturer Cleveland Diesel, Type Diesel, Model  16-278A

Propulsion control type;  GE/Westinghouse/Cutler Hammer

Main Motors; Number  4, Manufacturer GE/Elliot/Allis-Chalmers., Horsepower  1375

Battery:  batteries of  2 126 cells each, Manuf. Exide/Gould,  Capacity, Model VLA47B

Number, 4, Manufacturer Fairbanks Morse, Type Opposed piston diesel, Model 38D 8-1/8.