DIVE OAHU A dive club, open water certification courses, and daily boat charters for experienced divers are among this veteran operation’s offerings. Open-water certification courses are available for uncertified divers, while daily boat charters cater to seasoned divers. diveoahu.com. 1085 Ala Moana Blvd., 808.922.DIVE(3483). HAWAII SHARK ENCOUNTERS Guests are taken three miles off shore to where Galapagos and Sandbar sharks can be observed from a floating cage equipped with large plexiglass windows. Scuba experience is not necessary, as guests will stay on the ocean surface and use a mask and snorkel. hawaiisharkencounters.com. Haleiwa Small Boat Harbor 66-105 Haleiwa Rd., 808.351.9373. HAWAII WATER SPORTS CENTER For a day of water fun, visit Hawaii Kai and rent bumber tubes, banana boats, water rockets, jetskis or powerboats. If you’re looking to explore the ocean underwater, opt for scuba or snuba lessons, or stay above water, and try parasailing or wakeboarding and take your water excursion to new heights. hawaiiwatersportscenter.com. 7192 Kalanianaole Hwy., 808.395.3773.