Guba
Contributor
In Cozumel, it appears that some DMs use specially marked tubes that their boat operators recognize. That way, if more than one charter's groups are diving in the same area, the correct boat captain knows when to move in for pickup. Some of those sites have lots of groups criss-crossing and it's sometimes hard to follow who is where.
Some DMs don't like patrons to shoot tubes because it might create confusion for the boat crews.
Some DMs don't like patrons to shoot tubes because it might create confusion for the boat crews.