USS F-1 Submarine #20, date and location unknown. This photo may have been taken at San Francisco,
California. Note the name Carp is still visible on the bow. The liners Ventura (upper left) and Sonoma are
seen in the background.

October 1912: USS F-1 Submarine #20 aground near Watsonville, California. The F-1 was refloated on Oct. 18.

1914: USS F-1 Submarine #20 in drydock at Honolulu, Hawaii.

Three of the four F Class submarines at Honolulu, Hawaii. USS F-2 Submarine #21 (left), USS F-1 Submarine
#20 (center) and USS F-4 Submarine #23 (right). This photo was taken between July 1914 nd Nov. 1915.