 She also spent some time in the Indian Ocean, mostly working around Zanzibar.During "Operation Musketeer" (the Suez invasion) in late 1956, she was deployed at Port Said, clearing obstructions from the Suez Canal.In 1957 "Dalrymple" operated off the West Coast of Scotland, carrying out trials of a new radio-location system, before being extensively refitted, with improved radar, working spaces, messing and crew accommodation.