- Hawaii scuba diving is at its finest with Kona Coast Divers, the Big Island's professional leader in diving and service since 1967. KCD offers both air and Nitrox refills. It is a one stop shop for all your diving needs, offering escorted dive trips along the Kona coast and specializing in the world-class night dive, Manta Ray Madness. KCD offers the highest quality equipment, service and ...konacoastdivers.com