WHILE THE TRAINEES were getting ready for the second session, a mechanical, grinding sound came from the pool. The floor was sliding back, revealing a lower level much deeper than the first. Dave was looking pale. “Don’t worry,” said Carrie, “it looks like we’ll be diving. You don’t have to worry about sinking because you’re already underwater. But where’s our scuba gear?” Carrie lifted up a helmet. It had an elongated snout, like a dog’s muzzle. There was no sign of any masks or gas cylinders.
“If you are unable to breathe in water, place your respiration tablets in the receptacle in your helmets, and check that you can breathe normally before entering the pool,” said Errruorerrrrrhch.
Respiration tablets? Carrie frowned. What did the Manager mean? Most of the other trainees were slippi
