Simplify the following text for a Grade 9 native English-speaking person.
Original: CINCFLEET has responsibility for personnel , commando forces , ships and submarines and Royal Fleet Auxiliary in commission .
Simplified: Full command of the Royal Navy is the job of Commander-in-Chief Fleet ( CINCFLEET ) . The purpose of CINCFLEET is to provide ships , submarines and commando forces for military and diplomatic jobs as needed by the Government .