We were stationed with the U.S. Marine Corps there for 3 years. We got certified at the end of our first year and dove nonstop for the remaining 2 years. Okinawa is a shore divers paradise. While there are boat dives available to the outer islands, why bother? When not diving, there is plenty to see and do. The locals are extremely friendly, and because of the many military personnel, they are very used to helping with language barriers.