+1 for RJP. Explorer Ventures' dive lead was very explicit. *No* solo without proper certification and gear. Dive buddies were free to go off on their own or stay with group and the guide. The dive boat doesn't chase you and the dinghy was in case of emergency rescue, not just to pick up errant divers.
I'll expect to be back on this boat within 2016.
I'll expect to be back on this boat within 2016.