HMCS Nanaimo, Flower class corvette, it is:)
Well Frank this was indead for you, although to the best of my Knoldege their was Never actualy a Flower CLass Corvet named Flower, nore was their one Named Compass Rose from "The Cruel Sea", Great Book BTW, they made a move based on the book if I remember I saw a part of it once Havent seen it for years though would like to at some point. I Actualy Have a 8x10 Pick orf a Flower class Corvet on my dresser framed , got it from the Imperial war museum years ago after I read the above book.