Naval History and Heritage Command

Naval History and Heritage Command

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Sentinel I (S. P. 180)


The first Sentinel (S. P. 180) retained the name she carried at the time of her acquisition, the second (AM-113) was named for a general word classification.


(S. P. 180: tonnage 15; length 64'0"; beam 15'8"; draft 5'1"; speed 9.73 knots; complement 8; armament 2 1-pounders, 1 machine gun)

The first Sentinel (S. P. 180), a motorboat built in 1917 by Pacific Shipyards & Ways Co., Alameda, Calif., was purchased by the Navy from W. G. Tibbetts of San Francisco, Calif., on 9 August 1917 and commissioned the same day, Ens. Carl A. Lundquist, USNRF, in command.

Sentinel (S  P  180) Mare Island 21 Aug 1917  Box 619 Neg 6043 cropped
Sentinel off Mare Island Navy Yard, Vallejo, Calif., on 21 August 1917. Clearly discernable is the 1-pounder mounted aft, and a tripod-mounted machine gun atop her pilot house. (U.S. Navy Bureau of Ships Photograph in 19-LCM Box 619, National Archives and Records Administration, Still Pictures Branch, College Park, Md.)

Sentinel operated in San Francisco Bay during and after World War I, patrolling the harbor entrance and assisting small vessels. Decommissioned on 20 March 1919, she was transferred to the U.S. Coast Guard on 15 September 1919.

Renamed Tulare on 16 December 1919 in [Coast Guard] Circular Letter No. 118, she was assigned a permanent station at San Francisco on 1 January 1923. Classified as a harbor launch and renamed AB-14 on 6 November 1923, she remained in service until 1934.

Robert J. Cressman

6 October 2015

Published: Tue Feb 16 14:44:40 EST 2016