|Complement||5 + 45 men|
|Armament||Armament six 21" torpedo tubes, four forward, two aft, 18 torpedoes. one 3"/50 deck gun. two .50 cal. machine guns. two .30 cal. machine guns.|
|Max speed||19/8 kts knots (surfaced/submerged)|
|Engines||Diesels/Electric 2 shafts|
|Power||4300 / 2085 hp. (surfaced/submerged)|
|Notes on class||These boats were the first all-welded submarines in the US Navy. Their speed was reported to exceed 20 knots.|
All ships of the Porpoise class
See all Submarine classes.