During the dive Philip monitors all the action, and records it. Occasionally he will establish contact during silences to maintain touch with the divers. It's a critical part of the system, and an important safeguard. He can advise the topsiders if the divers need anything or if anything unexpected has happened. As well a narrative of finds on the bottom can be made.
Divers also find it useful for finding out what's for lunch.
Copyright 2001 Robert A. Goodson, All Rights Reserved.