TIME WARNINGS AND JUMP COMMANDS18-14. The six-minute and one-minute warnings are given by the pilot to the flight engineer, who in turn relays them orally and by hand signals to the JM. Due to the limited space available to hook up, only four jumpers are airdropped each pass.18-15.The commands on the CH/HH-3 are as follows:GET READY. The first four jumpers remove seat belts.STAND UP. Jumpers stand up and move to the anchor line cable.HOOK UP. Jumpers connect their USLM snap hook to the anchor line cable with the opening toward the skin of the aircraft.CHECK STATIC LINES. Each jumper takes a reverse bight in the USLM, ensuring the USLM remains over their bent elbow.CHECK EQUIPMENT. All jumpers check their equipment. Jumpers jumping equipment must be at the front of their stick.