“Here’s a really big obstacle, so we’ll give you a rope so you can get over it.”
Best way to train: If you have a rope, climb it. But as an alternative, finish each lift with a max dead-hang from a towel. It’ll train your grip to handle the thick rope. This, in combination with the pull-up routine at the beginning of the workout, will get you monkeying over any roped obstacle they throw your way.