2007年3月21日,英国皇家海军“不懈”号攻击型核潜艇在北极附近的冰层下与美军进行联合军事演习时发生事故,造成2名水手死亡,1名水手受伤。事故原因是潜艇前部的空气净化系统出现故障。北冰洋似乎是“不懈”号的禁地,早在2003年“不懈”号也在北冰洋因撞上不明物体而受伤。 On March 21, 2007, the British Royal Navy “Relentless” attack submarine accident occurred during a joint military exercise with the U.S. military under the ice layer near the North Pole, resulting in the death of two sailors and the injury of one sailor. The cause of the accident was the failure of the air purification system in the front of the submarine. The Arctic seems to be a “forbidden” ban, as early as 2003, “Unrequited” was also injured in the Arctic due to hit an unknown object.