F-4; THE FIRST SUBMARINE LOSS FOR THE US NAVY It was on the morning of March 25, 1915, that F-1, F-3, and F-4 left Honolulu for local operations. F-4 did not return, and the eventual detection and recovery was a classic of naval salvage. She was later “interned” at the bottom of Pearl Harbor after […]

Read More The Final Dive of the F-4 (March 1915)