Dave is a US National Freediving Team Champion and a 3x USoA All American Freediver. He and Terry Maas co-authored, FreeDive! A Complete Guide to Breath Hold Diving. He is a NAUI/TDI Instructor Trainer and has been teaching divers of all levels since 1985. He has been the recpient of a NAUI Outstaning Service Award and has lectured about diving saftey throught North America. Dave is a member of the Boston Sea Rovers.