Something a Lot Bigger
The officer claimed that after being torpedoed by an American submarine north of Kiska, he and his crew saw ripples in the water and fired their deck gun, hitting its conning tower. Bruce said how they originally thought a 3-inch shell hit the shears, which are the supports that hold the periscope.
USS Grunion Stern Section. Source: foxnews.com / Lost 52 Project
“Recently, though, we met Cmdr. Charlie Tate, who did eight war patrols on Gato,” which was the sister ship of Grunion. Tate told the Abele brothers that the damage to the shears was not caused by a 3-inch shell, but by something a lot bigger. Right now, according to Bruce, the hypothesis they’re leaning on is that it was a circular torpedo that never exploded.