第二次世界大战期间,位于苏格兰东北部的斯卡帕湾成了英国海军的主要舰艇集结地。早在第一次世界大战期间,这里就是外国潜艇难以进入的“安全区”。成了英国海军舰艇主要集结地之后,英国海军更是层层设防,并在通往斯卡帕湾的7个航道口,设有防潜栅和水雷或用沉船封住航道。潜艇要想贸然进入难于上青天。但是,历史会戏弄人们,“安全区”并不安全,斯 During World War II, the Gulf of Scapa in northeastern Scotland became the main naval assembly site for the British Navy. As early as during World War I, here was the “safe area” for the entry of foreign submarines. After becoming the main assembly point for the British naval vessels, the British Navy is more fortified at each level and has seven anti-submarine fencing and mines at the gateway to the Gulf of Scarperia. Submarine to rush into the hard-to-sky. However, history will tease people, “safe area” is not safe, Sri Lanka