This item contributes to an understanding of those involved in the war in Vietnam. John Dennis Giste. Service No: R62365. Cook. H.M.A.S Sydney 27/05/65. 16/09/65 - 20/10/65.A black and white photograph of the Royal Naval Base Singapore. The photos shows three US submarines in the foreground, one British Royal Navy submarine.giste, r62365, h.m.a.s sydney, vietnam, samberwang, singapore