Dennis Graver's 100 Best Scuba Quizzes
A challenge to all divers regardless of certification level. --Dive JournalA fascinating collection of self-tests…that will challenge any certified diver. --Alert DiverBest and most enjoyable ways for divers to expand their knowledge of diving and related topics. --VisibilityMakes it easy for divers to improve their knowledge in specific areas. --Florida Scuba News