Specifications:

Click on thumbnail for full size image	Size	Image Description		Source
Persistent (MSO 491)
	66k	23 April 1955 Launch day		J. L. Martinac Shipbuilding Corp.
	41k	23 April 1955 After launching
USS Persistent (MSO 491)
	23k	Courtesy Frank Fabriziani		USS Persistent (MSO-423) Website Rick Szpyrka
	83k	"In the afternoon sun..." Off Long Beach, CA Photo by George Arthur		Floyd Farrar
	208k	.		Barbara Ritola
	108k	c. Late 1957 Japan		Dan Hebert
	100k	c. early 1960s Viewed from Dynamic (MSO 432) Photo by George Arthur		Floyd Farrar
	68k	c. 1962 Off Long Beach, CA Photo by George Arthur
	255k	c. April 1967 Off the coast of Vietnam Photo taken from USS Caliente (AO 53)		Bill Dougherty
	276k	c. 1967 U.S. Navy photo		Robert Hurst
Guadalquivir (M 43)
	61k	Spanish Navy photos		Spanish Navy
	72k
	55k	c. July 1976 Rota, Spain		Richard Leonhardt
	261k	22 April 1989 La Spezia, Italy		Carlo Martinelli
	291k	3 June 1998 Departing Toulon, France

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Commanding Officers
01	LT Theodore Rogness "Rog" Johnson, Jr., USN - USNA Class of 1947	3 February 1956 - 17 January 1958
02	LCDR Corliss Robinson Nugent, USN - USNA Class of 1946	17 January 1958 - 8 March 1960
03	CDR George Edwin Barton, USN	8 March 1960 - 26 July 1961
04	LT James Edward Shay, USN - USNA Class of 1957	26 July 1961 - 11 August 1961
05	LCDR Joseph Dean Lorenz, USN	11 August 1961 - 11 September 1961
06	LT James Edward Shay, USN - USNA Class of 1957	11 September 1961 - 28 November 1961
07	LT/LCDR Earl Herbert Graffam, USN	28 NOvember 1961 - 8 July 1963
08	LCDR William Clyde Giovanetti, USN	8 July 1963 - 7 January 1965
09	LT/LCDR Arthur Raymond Ellingwood, Jr., USN	7 January 1965 - 1967
10	LCDR Walter Theodore Dziedzic, USN - USNA Class of 1959	1967 - October 1969
11	LCDR Edward David "Ted" Sheafer, Jr., USN - USNA Class of 1962 Awarded the Defense Distinguished Service Medal, Defense Superior Service Medal, three Legions of Merit, the Bronze Star with Combat V, the Meritorious Service Medal, the Navy Achievement Medal and the Combat Action Ribbon - Retired as Rear Admiral	October 1969 - 1971
12	LT Everett W. Holland, USNR - Retired as Rear Admiral	1971 - 26 April 1971

Courtesy Wolfgang Hechler, Ron Reeves and Joe Radigan

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View the Persistent (MSO 491) Crew Photos

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Following Pacific coast shakedown, Persistent reported for duty to Commander, Pacific Fleet, 2 March 1956 and was designated flagship for Mine Division 91 the same day. In September 1956 she was modified for advanced sound reduction to protect against acoustic mines.

In August 1957 she deployed to WestPac as part of Mine Countermeasures Group, 7th Fleet. After return to Long Beach for regular overhaul in February 1958 and completion of type training that year, she engaged in research at the Navy Acoustic Range, Puget Sound, September 1959. Later that year she measured ocean currents under assignment to Scripps institute of Oceanography.

After another deployment to WestPac in 1960, she returned to California in July. After type training in 1961, she deployed to WestPac in January 1962, assisting in the training of South Vietnamese sailors from January to August. After domestic operations in 1963, she deployed annually to WestPac from 1964 to 1968. Into 1970 she remained active with the Pacific Fleet. Decommissioned, 1 July 1971; Struck from the Naval Register, 1 August 1974 and sold to Spain under the Security Assistance Program, renamed Guadalquivir (M-43).