During the Cold War '' Tireless '' was primarily involved in anti-submarine warfare patrols in the Atlantic Ocean . After the Cold War , '' Tireless '' was deployed around the world , including to the Arctic Ocean , Mediterranean Sea and Pacific Ocean . At the end of its career , '' Tireless '' was involved in the search for the missing airliner , Malaysia Airlines Flight 370 . The vessel experienced a number of serious accidents during its operational life
Malaysia Airlines Flight 370
Malaysia Airlines Flight 370
HMS Tireless (S88)