Thanks guys. A few more (likely the last of this thread):
This is TANG (SS-306) in April of 1944, during the boat's second war patrol. She is camouflaged in the usual Measure 9 overall black of the period. During this patrol, TANG was assigned as a lifeguard submarine off Truk where the boat rescued 22 downed aviators.
TANG exhibits the standard features for the "as built" BALAO class submarines, which incorporated many of the wartime improvements made to the GATO class. Two 20mm Oerlikons sit on the fairwater, with a 4"/50-caliber deck gun forward. The SJ and SD radars are mounted aft of the periscopes - this arrangement would be revised on later boats.
TANG was lost in October of 1944 after being hit by a malfunctioning torpedo that made a circular run. 78 officers and crewmen were killed in action, with only nine men surviving the sinking and their later imprisonment and torture at the hands of the Japanese. TANG and her commanding officer Richard O'Kane registered 33 ships sunk totalling 116,454 tons, making her one of the highest scoring submarines of the war.
This is DRUM (SS-228) in July of 1945 after the conclusion of a refit period at Hunter's Point Navy Yard in San Francisco, CA. The boat is camouflaged in Measure 32/9SS-B.
The lack of large targets worth the expenditure of a torpedo as the war reached its conclusion meant that special emphasis was placed on the gun armament of the American submarines. The highly successful 5"/25 wet mount was occasionally mounted both fore and aft on some boats, leading to the "gun boat" configuration seen on DRUM here. Otherwise, DRUM shows very standard late war GATO class features, with SV air search and SJ-1 surface search antennas, ST range-only radar on the attack scope, and APR-1 countermeasures receivers arrayed on the shears. A 40mm Bofors Mark 3 mount sits on the forward edge of the fairwater, with a 20mm Oerlikon twin mount aft on the cigarette deck.
DRUM would survive the war to become a museum ship in Mobile, Alabama.