A good port side view of Porpoise. The location is unknown for sure, but suspected to be the Piscataqua River near Kittery, ME. The date is probably the fall of 1935, shortly after her commissioning. She does not yet have a deck gun installed in the photo.
National Archives photo
Porpoise a little later in her career, circa 1937. Location is somewhere in the Pacific Ocean. She has now been fitted with a 3"/50 caliber Mk 6 gun aft of the conning tower fairwater.
Photo NH 6367-42 courtesy of the Naval History & Heritage Command.
Porpoise in San Pablo Bay near the Mare Island Navy Yard, CA., October 13, 1942, after her first wartime overhaul. She has received modifications similar to Pike, An SD air search radar on the forward end of the conning tower fairwater, SJ surface search radar near the periscope shears, the aft end of the fairwater has been cut down with a 20 mm gun mounted there, and a 3"/50 caliber Mk 17 gun installed on the aft deck. She also has had to additional superstructure mounted torpedo tubes fitted near the bow.
USN photo # 1464-44, courtesy of NARA.
Porpoise seen here off Philadelphia after her last major wartime overhaul, July 20, 1944. The forward end of the conning tower fairwater has been cut down, and the deck gun has been moved to the forward mount. Like Pike, Porpoise had been retired from active war patrols in the fall of 1943 and had been operating out of New London as a training boat for new submarine crews.
