(d) Each Ranger puts a carabiner in his end of the bow line and in the front sight assembly of every M 4, M16, or M203. M240 gunners put a carabiner through the front sight assembly and rear swivel of their M240 MG. RTOs (and others with heavy rucksacks) place an additional carabiner on the top center of their rucksack frames. (e) Team establishes security upstream and downstream, while unit leader briefs the BTC on anchor points. The leader counts the Rangers across. (f) The BTC enforces noise and light discipline, and maintains security. (2) The bridge team is responsible for constructing the rope bridge as follows: (a) Ranger #1 (Lead Safety Swimmer and Far Side Lifeguard) grounds his rucksack (with carabiner through top of frame) to the rear of the near side anchor point. He wears equipment in the following order (body out). He carries a safety line to assume duties of far side lifeguard: • Waterborne uniform (top zipped up, neck collar fastened, and pants unbloused) • B7 life preserver or engineer work vest • FLC • Weapon (across the back) (b) Ranger #1 enters the water upstream from Ranger #2 and stays an arms length away from Ranger #2 on the upstream side. Ranger #1 identifies the far side anchor point upon exiting the water. Once Ranger #2 has exited the water, he moves to his far side lifeguard position downstream of the rope bridge, with knotted safety line on wrist, FLC/ weapon grounded, and work vest held in throwing hand. He continues to wear the B7. (c) Ranger #2 (Rope Puller) in waterborne uniform (same as Ranger #1) wears his equipment in the following order. He grounds his rucksack (with Ranger through top of frame) to the rear of the near side anchor point. His duties are to swim across the water obstacle pulling the rope. He ties off the rope on the anchor point identified by Ranger #1 with a round turn and two half hitches with a quick release. The direction of the round turn is the same direction as the flow of water (current) to facilitate exit off the rope bridge: • Weapon (across the back) • Swimmer safety line • Work vest • FLC (d) Ranger #3 positions himself on the downstream side of the bridge before Rangers #1 and #2 enter the water. (e) Ranger #3 (Near Side Lifeguard) wears the same type (waterborne) uniform as the far side lifeguard. He grounds his rucksack (with carabiner through top of frame) on rear of near side anchor point. After the PSG crosses and verifies the headcount, Ranger #1 unties the quick release at the near side anchor point. Ranger #3 reties his safety line into an Australian rappel seat, hooks the end-of-line bow line into his carabiner, and connects his carabiner to the one on the end of line bow line. Ranger #3 is the last pulled across the water obstacle. Before crossing the water obstacle, he dons his equipment in the following order: • B7 • Work vest • FLC • Weapon (f) Ranger #4 (BTC). He wears the standard waterborne uniform with FLC and sling rope tied in safety line (around the waist bow line with end-of-line bow line no more than one arms length). He is responsible for construction of the rope bridge and organization of bridge team. He is also responsible for back-feeding the rope and tying the end-of-line bow lines. He designates the near side anchor point, ties the Figure 8 slip of the transport-tightening system, and hooks all personnel to the rope bridge. He ensures that the transport- tightening knot is on the upstream side of the rope bridge. He ensures that all individuals are in the waterborne uniform, hooked into the rope facing the current with the safety line routed through the trailing shoulder of the individual's FLC and rucksack. He ensures that the weapon is hooked onto the rope. He