The USS Sentinel (SP-180) was a motorboat constructed in 1917 by Pacific Shipyards and Ways Co. in Alameda, California. As the first U.S. Navy vessel to bear the name, Sentinel was acquired from W. G. Tibbetts on August 9, 1917, and was commissioned into service on the same day. The vessel was designed as a patrol boat, primarily tasked with operations in San Francisco Bay during and after World War I. Physically, the Sentinel was a motor-powered vessel, although specific dimensions and tonnage are not provided in the available source. Its primary role involved patrolling the harbor entrance of San Francisco Bay, a strategic location during wartime, to ensure security against potential threats and to assist smaller vessels navigating the busy harbor. Sentinel's service was relatively brief, concluding with her decommissioning on March 20, 1919. Shortly thereafter, on September 18, 1919, she was transferred to the United States Coast Guard. Upon transfer, she was renamed Tulare, marking her transition from Navy to Coast Guard service. Later, on November 6, 1923, she received another renaming to AB-14, and she continued in service until 1934. Throughout her operational life, the Sentinel/Tulare/AB-14 served as a patrol and auxiliary vessel, contributing to maritime security and harbor operations along the California coast. Her transfer from the Navy to the Coast Guard and subsequent renaming reflect the common practice of repurposing vessels for different maritime functions. Her service history highlights her role in supporting U.S. naval and coast guard operations during the early 20th century, particularly during World War I and the interwar period.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.