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FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
COASTAL FORCES
"MSSC Mk I" medium SEAL craft (36UB691) (1969)


Photo



MSSC

Ships


Names Builders Commissioned Losses Transfers Discarding

36UB691-699

36UB6910

 

1969: 36UB691-699, 36UB6910

?

none

1970s?



Technical data


Displacement standard, t 
Displacement full, t

 

Length, m

11.0

Breadth, m 
Draught, m 
No of shafts 
Machinery 
Power, h. p. 
Max speed, kts 
Fuel, t 
Endurance, nm(kts) 
Armament3 x 1 - 7.6/90, 1 x 1 - 40/12 M19 grenade launcher
Electronic equipment 
Complement 


Graphics


MSSC
MSSC


Project history

The SEALs were organised in about 1961. Initially they operated from special swimmer delivery craft, some of them prototypes of the riverine craft. Two LCMs were modified as heavily-armoured SEAL support boats (heavy SEAL support craft, or HSSCs) and modified LCPLs became medium SEAL support craft (MSSC). Requirements for replacements (a new MSSC and a light craft, the LSSC) were formally stated in December 1967. Both were modified commercial boats, armed with a variety of small guns on pintle mounts. The LSSC was derived from a commercial 26-footer modified as the STAB (SEAL team assault boat). They were later redesignated STABs (strike attack boats). In addition, ten 36ft MSSCs were bought in 1968.

Modernizations

None.

Naval service

Boats were actively used in Vietnam.

© Ivan Gogin, 2015