Rasdhoo is a small round island — barely 500 by 600 metres — at the western edge of Alif Alif atoll, where the outer reef drops cleanly into the Indian Ocean. The island is the atoll capital: a working harbour, a tight grid of coral-walled lanes, half a dozen dive centres, and a community that has lived alongside the dive register longer than most. The signature dive is Madivaru, just off the western corner. A small boat leaves around five in the morning; you descend in open blue, hover at 25 metres along the channel edge, and wait. In season — December through April, peaking January to March — scalloped hammerheads patrol below, sometimes singly, sometimes in schools of twenty or more. Sightings are roughly even odds on any given morning, which is honest by the standards of pelagic diving. Manta cleaning stations and reef-shark drift dives fill the rest of the day.
For divers drawn to the open-water register — the pre-dawn boat out to Madivaru, the descent into deep blue, and the slow patrol of scalloped hammerheads beneath. The country's most consistent hammerhead dive.
- Hammerheads · Madivaru
- Manta cleaning stations
- Working harbour