The Hawaiian Tourist Carding Program can be booked at Ctrip or hotels. The submarine on Oahu Island is situated at the seaside of Hilton Hotel on Waikikiki Beach. The submarine cruises every hour, first ferry to the waters near Diamond Hill, then boarding the submarine, the deepest dive is about 100 feet, the dive time is about 45 minutes. Submarine yachting is still worth recommending and can add a lot of knowledge. Dolphins were also seen during the ferry. Turtles, fish and wrecks of wrecked ships and airplanes were seen after launching.