I have been diving for several years and was thinking about becomming a Divemaster not for the money but to be able to help out with classes and learn. (I already have the pre-requsites to take class) However as this is now going into the professional side, how much libility is there? I know you are suppose to have insurance which costs about $300 a year. What if you go out with your friends like normal and something happens, can your friends family now come and say "hey, you are a Divemaster and you were there and should have recognized the potential problem, so we are suing you? Which mean you better have the insurance all the time, working or not?