In reply to alexm198:
It's pretty straightforward when you're there. There's a couple of T shaped metal spikes on the far side, chuck a bight of rope over one, pass it around the T anchor on your side, then knot the ropes together so you've made a loop that goes around both anchors across the gap. Twiddle the rope so the knot goes to the far side. Attach yourself to the rope with a couple of opposed screwgates, then monkey across. When everyone's across undo the knot to retieve the rope. Simples.