USS Caspian (ID-1380) was the proposed name and hull classification for a tug that never actually served in the United States Navy.

Caspian

SS Caspian sometime between 1912 and 1917.
History
United States
Owner	P. F. Martin
Builder	John Dialogue and Son, Camden, New Jersey
Completed	1912
Notes	Registered as ID-1380 for potential U.S. Navy service
General characteristics
Type	Tug
Displacement	125 tons
Length	80 ft 6 in (24.54 m)
Beam	21 ft 6 in (6.55 m)
Draft	10 ft 2 in (3.10 m)
Installed power	500 ihp (370 kW) steam engine
Propulsion	Single screw
Crew	8

SS Caspian was a steel-hulled commercial tug built in 1912 by John Dialogue and Son at Camden, New Jersey. In early March 1918, the Commandant of the US Navy's 4th Naval District ordered that she be taken over for World War I service. The Navy assigned her the hull classification ID-1380 in anticipation of commissioning her as USS Caspian. However, the Navy never took possession of her, and she remained in civilian service with her owner, P. F. Martin of Philadelphia, Pennsylvania.