 Although her primary duty was training student officers and enlisted men at the Mine Warfare School, Yorktown, Virginia, "Grouse" also participated in experimental work at Countermeasures School and Mine Defense Laboratory, at Panama City, Florida.Various minesweeping exercises and regular overhauls consumed most of the rest of her time, although in 1954 and 1955 she was attached to the Hydrographic Office for Project Vamp, a special coastal survey along the Virginia and Massachusetts shores.On 1 March 1955 "Grouse" was reclassified MSC(O)-15.