of Southcentral Alaska, where she transported passengers in addition to carrying out her patrol duties. During 1923, she also began patrols to protect fur seal and sea otter populations. She logged on patrol duty during the 1926 fishing season. In 1927, she transported materials for the construction of a weir at Chinik Creek in Kamishak Bay on the coast of Southcentral Alaska. On 25 October 1928, she was among several BOF vessels tasked to assist U.S. Navy vessels in enforcing the provisions of the Northern Pacific Halibut Act of 1924 in the Bering Sea and North Pacific Ocean, with her crew granted all powers of search and seizure in accordance with the act to protect populations of Pacific halibut. Sometime around 1930, Kittiwake was assigned to summer patrols in the Seward/Katalla district in Southcentral Alaska, and later she was reassigned again to patrol in the waters of Southeast Alaska. During the winter of 1933–1934, she was one of several BOF vessels to receive an extensive overhaul funded by a US$20,000 allocation by the Public Works Administration. In the mid-1930s, she assisted in operations to tag herring and pink salmon in Alaskan waters. On 30 July 1938, she struck an uncharted rock in Moira Sound on the east side of the southern end of Prince of Wales Island in the Alexander Archipelago in Southeast Alaska; she underwent repairs at Ketchikan, Territory of Alaska. Fish and Wildlife Service, 1940–1942 In 1939, the BOF was transferred from the United States Department of Commerce to the United States Department of the Interior, and on 30 June 1940, it was merged with the Interior Department's Division of Biological Survey to form the new Fish and Wildlife Service, an element of the Interior Department destined to become the United States Fish and Wildlife Service in 1956. Kittiwake thus became part of the FWS fleet as US FWS Kittiwake. U.S. Navy service, 1942–1944 In 1942, the U.S. Navy acquired Kittiwake for World War II service, designating her as a yard patrol boat and renaming her USS YP-199. Assigned to the Thirteenth Naval District Inshore Patrol, as of 15 May 1942 she was based at Section Base, Port Townsend in Port Townsend, Washington. The Navy employed her as a utility vessel and dispatch boat in and around Puget Sound. The Navy returned YP-199 to FWS control in May 1944 and struck her from the Navy list on 9