Current Version Including Arresting wire System ,catapult and Optical Lading System. Arresting wire include a hook and a wire. Mount wire to the deck and hook on the plane. Drop hook to hook the wire and retract hook to release from wire. Catapult is the white block, drive the front landing gear to the white block, the block turns blue after grab the wheel, brake to prepare, the block will turn yellow after that. Release the brake to launch. You can brake during the launch to terminate