suzette
Contributor
Seems pretty simple to me!
In a normal drift dive on the East Coast, it is the responsibility of everyone following the "flag person" to stay with them. The person carrying the flag should not have to heard the cats. In a situation where you are swimming and not drifting, I would still follow the above situation. You are carrying the flag. They need to stay with you. Four people might be too much if the visibility is limited. Should have been two buddy teams.
This is my thought exactly- a separation plan should have been made, but on all dives I've been on where you're following the person with the flag, you do NOT allow them out of your sight. If they had trouble or some reason that they had to stop, they should have alerted the flag carrier with an audible signal so that he wasn't put in that situation.