This question may be a stretch for this forum but the pervious post about flags had me thinking about what happen last year.I read about a dive site, an old sugar ship that had sunk many years ago. I found it on the chart and thought it would make a fun destination for snokeling. When we arrived we were the only one's there. I anchored and the boat drifted about 100 feet from the site. The four of us jumped in, swam to the site and enjoyed swimming and snokeling untill I notice a stink boat traveling at 40 knots directly at us. At about 300 yards he turned off but not before giving me some lip service about not having a divers flag displayed on the boat. I am happy to accept responsiblity for this event and I am glad no one was hurt.I have since purchasd a dive flag but I don't know the rules about displaying it. Is it a good idea to display a divers flag when swimming near your boat? Is it legal if your not a diver? I don't know why a stink boat would have to travel within a 100 feet of an anchored boat at 40 knots anyway, as if the Gulf of Mexico isn't big enough for two of us. {venting}. Anyway, thank you Phil for the leeway on this subject. Jack