An earthsuit was not so much a single garment as a toolkit of parts that could be snapped together in different ways depending on conditions. The refrigeration system couldn’t work unless it could discharge heat into the environment. Normally it did that by shooting hot air straight up out of a pipe, but in circumstances like these, where a supply of water was near to hand, the air-based heat exchanger could be swapped out for a module that performed the same task by heating up water. A system of umbilicals made it possible for the hot part of it to trail in the Brazos along the flank of the pontoon boat, so long as the users didn’t expect to do a lot of moving around. There was only so much moving around one could do in a craft of this size and so the restriction wasn’t a problem.