a belay to anchor equipment

Reader's　Digest 3月号の記事 "RESCUE ON THE HIGH RISE BRIDGE" からの引用です。

Poag and Gregory gathered the rest of the equipment they expected to need from their truck: more rope, a pulley system called a set-of-fours, and a belay to anchor equipment to at the scene.

"belay" はかなり前（9/9/2013）に取り上げていましたが、忘れているので再度英英辞書の説明を見ます。

・Oxford English Dictionary: Fix (a running rope) around a cleat, rock, pin, or other object, to secure it.: I realised that the sump rope was belayed some 4m from the end of the sump, and so I'd crossed the sump pool under water.

・Collins Dictionary: to secure (a climber) to a mountain by tying the rope off round a rock spike, piton, nut, etc: Some belay devices may also be used as descenders.

・Dictionary.com: a rock, bush, or other object sturdy enough for a running rope to be passed around it to secure a hold.: In 1981, using ropes and a belay, filmmaker Eric Perlman and skier Bob Bellman descended the Cables Route.