10-65. Hook the ratchet end of the strap to the opposite sidewall ring at FS 847, remove all the slack from the strap, and ratchet the strap until taut. The strap will be premeasured prior to pre-slowdown and excess strap taped. Using the static-line retriever, retrieve the static lines over the strap and as the parachutist is pulled up to the ramp, bring the parachutist into the aircraft by hand underneath the strap.WARNINGThe last five feet are the most crucial for the towed parachutist. An oscillating parachutist usually strikes the aircraft head first. If the parachutist is oscillating violently, stop the retrieval momentarily to allow stabilization, and then continue with retrieval. Repeat these steps as required.Note. After the parachutist is pulled up to the ramp and is being controlled by the jumpmaster, the safety observer or loadmaster slightly unwinds the static-line retriever to relieve tension on the line so the parachutist can be brought into the aircraft.