USS Niagara (SP-136)
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The sixth USS Niagara, later PY-9, was a United States Navy patrol vessel in commission from 1918 to 1931 and which served during World War I.
Howard Gould at his desk aboard the Niagara
Men and lifebuoy, 1915
Niagara; the old and the new 00blan 0015
Armed yacht
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An armed yacht was a yacht that was armed with weapons and was typically in the service of a navy. The word "yacht" was originally applied to small, fast and agile naval vessels suited to piracy and t
The British anti-submarine yacht HMS Tuscarora during World War II. It had been built in 1897 as a luxury steam yacht.
USS Hauoli, a former luxury steam yacht. This patrol vessel served as USS California from December 1917 until February 1918 in the harbor defense role, when she was renamed Hauoli and used for anti-submarine research.
The Canadian armed yacht HMCS Renard in World War II. The same yacht had served as USS Winchester in World War I.