History
United States
Name	USS Herman S. Caswell
Namesake	Previous name retained
Completed	1878
Acquired	8 October 1918
In service	8 October 1918
Out of service	7 March 1919
Fate	Returned to owner 7 March 1919
Notes	Operated as private yacht and ferry Herman S. Caswell 1878-1918 and from 1919
General characteristics
Type	Patrol vessel
Tonnage	220 Gross register tons
Displacement	63 tons
Length	82 ft 9 in (25.22 m)
Beam	17 ft 7 in (5.36 m)
Draft	7 ft 6 in (2.29 m)
Propulsion	One 198-indicated horsepower (148-kilowatt) steam engine, one shaft
Speed	10 knots
Complement	8 (civilian)
Armament	None

USS Herman S. Caswell (SP-2311), was a United States Navy patrol vessel in service from 1918 to 1919.

Herman S. Caswell was built as a civilian passenger yacht or ferry of the same name in 1878 at Noank, Connecticut. On 8 October 1918, the U.S. Navy chartered her from her owner, New York Sightseeing Yachts, for use as a section patrol boat during World War I. She was placed in service as USS Herman S. Caswell (SP-2311).

Assigned to the 3rd Naval District, Herman S. Caswell served on patrol and harbor duties until returned to New York Sightseeing Yachts on 7 March 1919.

References

• This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
• SP-2311: Herman S. Caswell at Department of the Navy Naval History and Heritage Command Online Library of Selected Images: U.S. Navy Ships -- Listed by Hull Number: "SP" #s and "ID" #s -- World War I Era Patrol Vessels and other Acquired Ships and Craft numbered from ID # 2300 through ID # 2399
• NavSource Online: Section Patrol Craft Photo Archive Herman S. Caswell (SP 2311)