Japanese destroyer Hasu

The Japanese destroyer was one of 21 s built for the Imperial Japanese Navy (IJN) in the late 1910s. After serving for 23 years and throughout the Pacific War, she was retired 12 October 1945 and scuttled as breakwater in Fukui in 1946.
Design and description.
The "Momi" class was designed with higher speed and better seakeeping than the preceding second-class destroyers. The ships had an overall length of and were between perpendiculars. They had a beam of , and a mean draft of . The "Momi"-class ships displaced at standard load and at deep load. "Hasu" was powered by two Parsons geared steam turbines, each driving one propeller shaft using steam provided by three Kampon water-tube boilers. The turbines were designed to produce to give the ships a speed of . The ships carried a maximum of of fuel oil which gave them a range of at . Their crew consisted of 110 officers and crewmen.
The main armament of the "Momi"-class ships consisted of three Type 3 guns in single mounts; one gun forward of the well deck, one between the two funnels, and the last gun atop the aft superstructure. The guns were numbered '1' to '3' from front to rear. The ships carried two above-water twin sets of torpedo tubes; one mount was in the well deck between the forward superstructure and the bow gun and the other between the aft funnel and aft superstructure.
In 1939–40, "Hishi" was converted into a patrol boat. Her torpedo tubes, minesweeping gear, and aft 12 cm gun were removed in exchange for two triple mounts for license-built Type 96 light AA guns and 60 depth charges. In addition one boiler was removed, which reduced her speed to from . These changes made her top heavy and ballast had to be added which increased her displacement to .
Construction and career.
"Hasu", built at the Uraga Dock Company in Uraga, was launched on December 8th 1921 and completed on July 31st, 1922. The ship served throughout the Sino-Japanese War and World War II. It was officially retired on October 12th, 1945 and was scuttled as a breakwater in Fukui in 1946.