for divesites, just check with your divemaster, they will take you to a spot that you will be comfortable with...

I also like to take lots of (proable about 3/4th of my total amount) ones and fives for tips and small purchases. My last trip, I still ended up with a twenty at the airport, but Jet gave me American change.

Nice link Marty!!
That ones almost as good as this one
http://www.why.can\'t.marty.convince.me.to.get.on.ambergriscaye.com/