The USS Ptarmigan was a United States Navy patrol vessel that served during World War I. It was originally a civilian yacht named the Nahma before being acquired by the Navy in May 1917 and commissioned as the USS Ptarmigan. The ship was primarily used for patrol and escort duties along the eastern coast of the United States. It was armed with a single 3-inch gun and depth charges for anti-submarine warfare. During its service, the USS Ptarmigan operated out of New London, Connecticut, and Bermuda, conducting patrols and escorting convoys to protect against German U-boats. The ship was later transferred to the Coast Guard and continued to serve in various capacities until it was decommissioned in 1922. The USS Ptarmigan's service history highlights the important role that patrol vessels played in safeguarding coastal waters and escorting merchant convoys during World War I. Its transition from a civilian yacht to a military vessel exemplifies the adaptability and resourcefulness of naval forces during times of conflict. The ship's deployment in the waters of the Atlantic Ocean showcases the strategic importance of maritime defense and the collaboration between the Navy and Coast Guard in safeguarding the nation's coastlines.

This description has been generated using GPT-3.5-TURBO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.