Nov. 24, 2013

Periscope photography by submarines was vital for Battle of Tarawa

This photo shows USS Nautilus (SS-168) off the Mare Island Navy Yard, Calif., April 15,1942, following modernization. Note her very heavy deck armament of two 6"/53 guns; also embrasure in her upper hull side, just in front of the forward gun, for newly-installed topside torpedo tubes. At least two torpedoes are on deck above this location,