William , 25 , will spend the first part of his attachment on a basic sea safety course training in sea survival , firefighting and ship damage repair , according to the ministry . Britain 's King William begins six - month attachment with Royal Navy on Monday . William has completed attachment with the Royal Air Force . The future king is a second lieutenant in the British Army . This will prepare him for when he becomes head of armed forces as well .
Britain 's King William begins six - month attachment with Royal Navy on Monday . William has completed attachment with the Royal Air Force . The future king is a second lieutenant in the British Army . This will prepare him for when he becomes head of armed forces as well .