Mezue ahịrịokwu na-esonụ: Mgbe ọ na-arụ ọrụ ọ sonyeere 7th Escort Group dabere na Greenock na Scotland, na ndị ọzọ so gụnyere nwanne ụgbọ mmiri na na-esote sonyeere na. Ọrụ ya gụnyere iduzi na ịkwado ndị njem na North Atlantic na Gibraltar. Na July 1943, "Crane" sonyere na
Operation Husky, mbuso agha nke Anglo-American nke Sicily, na-eso ndị agha agha si Britain gaa Mediterranean site na 28 June ruo 7 July, na mgbe ahụ, ndị agha nke abụọ na-aga n'ụsọ osimiri na 13 July. N'August 1943, iji zere mwakpo nke ụgbọelu nke RAF Coastal Command na Bay of Biscay, ụgbọ mmiri U-boats nke Germany na-aga n'ebe ugwu Atlantic malitere ịmakụ ụsọ oké osimiri France na Northern Spain. Dịka nzaghachi, ndị Royal Navy zigara ndị otu Escort ka ha na-agagharị na Cape Finisterre iji gbochie ndị Germany iji ụzọ a, mana mwakpo ikuku nke ndị Germany mere ka ndị nche ahụ gaa n'ihu n'ebe ọdịda anyanwụ, ebe ha na-adịghị arụ ọrụ. E ji "Crane" mee ihe nwa oge n'otu n'ime ìgwè ndị a na Septemba 1943, ma ọ nweghị ihe ịga nke ọma.