>From the “Dictionary of American Naval Fighting Ships,” 

(1981) Vol. 7, pp.1-2.





T-1





SST-1



Displacement:  

	Surfaced:  303 t.

	Submerged:  347 t.

Length:  131’3”

Beam:  13’7”

Draft:  12’2” (mean)

Speed:  

	Surfaced:  10 k.

	Submerged:  10.5 k.

Complement:  18

Armament:  1 21” torpedo tube

Class:  T-1



	T-1 (SST-1)--originally planned as AGSS-570--was laid 

down 1 April 1952 at Groton, Conn., by the Electric Boat 

Division, General Dynamics Corp.; launched 17 July 1953; 

sponsored by Mrs. Charles R. Muir; and placed in service 9 

October 1953, Lt. J. M. Snyder, Jr., in command.



	After completing trials in the New London and 

Massachusetts Bay areas, T-1 departed, in February 1954, for 

Key West, Fla.  Arriving at Key West, she commenced 

operations with submarine and antisubmarine forces in the 

southern Florida-Guantanamo Bay, Cuba, areas.  Effective 15 

July 1956, T-l was renamed MACKEREL; but she retained her 

hull number, SST-1.



	MACKEREL participated in fleet exercises off the east 

coast, mainly conducting training and target assignments, 

including some for the Fleet Sonar School at Key West.  She 

made several cruises testing new equipment for submarines.  

On 2 April 1957, she departed Key West on a special 

sound-damping project, en route to Annapolis, Md.  After 

more training and target cruises into the late 1950’s, she 

tested acoustical developments for submarine hulls in waters 

near the British West Indies in the summer of 1963.  She 

again operated in the West Indies in February 1964, 

performing similar tasks.



	She received new equipment at Groton in the spring of 

1966 and headed south, arriving at Key West on 26 June.  

There, MACKEREL conducted experimental work to acquire data 

to be used in the development of future Navy submarines.  

After finishing this assignment in March 1967, the submarine 

had some of her special equipment removed, and she resumed 

operations at Key West for the Fleet Sonar School.



	MACKEREL acted as a target for surface and air ASW 

forces off the Florida coast and in the Caribbean during the 

late 1960’s and into the 1970’s.  Sometime in 1971, MACKEREL 

was commissioned.  She provided target and training services 

for antisubmarine warfare units of the Atlantic Fleet in the 

Key West and the Mayport/Jacksonville operating areas in 

1971 and 1972.  She made her last dive on 21 July 1972.  She 

remained in reduced-complement status from that day until 31 

January 1973 but, nevertheless, conducted junior officer and 

midshipmen training regularly through October 1972.  

MACKEREL and her sister MARLIN (SST-2) were decommissioned 

on 31 January 1973 in a dual ceremony at the Naval Station, 

Key West, Fla.; and both were struck from the Navy list on 

the same day.  MACKEREL was subsequently scrapped.



	[MACKEREL was sunk as a target off Puerto Rico on 18 

October 1978.



K. Jack Bauer and Stephen S. Roberts, “Register of Ships of 

the U. S. Navy, 1775-1990,” p.296]





Transcribed by Michael Hansen

mhansen2@home.com