Along the northeast corner of Kadavu a passage cuts through the Great Astrolabe Reef complex. It is called Naingoro Pass, because there is often a moderate current, a drift dive is the recommended procedure for exploring the underwater terrain. The walls of the passage begin in 10 feet of water and slope sharply to the passage floor. The floor then gradually slopes off into deeper water (200 + feet). The passage walls are splashed with a variety of purple and red soft corals and tourists can see tiger sharks, hammerheads and other big game sightings.