the fort that had 2 six inch gun emplacements and special lookout positions was reused during world war ii to protect the entrance to botany bay. the underground bunker and tunnels inside the fort had vaulted weapons storage rooms with double walls and ceilings. the doubling up of walls and ceilings was a special way of stoppng the walls from collapsing if the fort suffered a direct hit from a missile (rocket) fired from an enemy ship. the battery is currently not in use.