Britain 's King William begins six - month attachment with Royal Navy on Monday . Prince William and his father , Prince Charles , at his graduation from the Royal Air Force in April . William has completed training with the Royal Air Force . The future king is a second lieutenant in the British Army . Experience will prepare him for when he becomes head of armed forces as king .
Britain 's King William begins six - month attachment with Royal Navy on Monday . William has completed training with the Royal Air Force . The future king is a second lieutenant in the British Army . Experience will prepare him for when he becomes head of armed forces as king .