<< If you are serious about diving, the commercial
trips have been all but ruined for me as liability has driven then to
require
wearing or dragging a PFD. The scuba trips don't. Apparent assumption is
that
snorkle people are amateurs. It is true that the scuba users have passed
certification. >>
Currents at reefs are usually 2 Knots or more. Dragging a ski line that
floats 100' behind boats is a safety measure you should observe. Many
snorkeler and diver has been lost when swimming with current he has gone to
far from support vessel to be seen or recovered.
SF