Experienced divers and newer divers often use hand signals while diving.  Sometimes we forget the most basic ones when trying to communicate to our buddy or divemaster.  I found this article at www.dailyscubadiving.com.  Maybe it help you refresh you communication skills.
Verbal communication is not an option underwater unless you are wearing a full-face mask, [...]

Recreational diving is still a relatively young sport. Created in the 1950s, it gained acceptance in the ’60s and ’70s, boomed in the ’80s and took great technological leaps in the ’90s. So there’s a good chance that not everything you learned in your open-water class still applies. New research and equipment have made diving [...]

 
I have  often been asked about teaching scuba and how do you find a good scuba instructor.  I found this article and I hope it may help you make a wise decision.
This was written originally by John Flanders an amazing Master Instructor Extrordinaire and Principal of Academy of SCUBA, located in Peoria, Arizona.
I’ve been diving [...]