Thiladhunmati Atoll (Tiladummati in the Admiralty Charts) is a very open, atypical atoll without a clearly delimited lagoon. It stretches SSW for 76 km and contains nearly forty islands generally of a fair size.

Tiladummati Atoll consists of about 40 islands and islets; most lie farther apart and are larger than those in the Maldives farther S. 

The islands in the NE part of the atoll are the largest.

There are fewer islets but more reefs on the W side of the atoll than on the E side.
The passages through the barrier reef on the W side are navigable but should be avoided. Safe passages leading into the lagoon are on the E side of the atoll, but the vessel must be conned from aloft.

Caution.— Aerial photographs show the shapes and size of islands to differ substantially from surveys originally dated from 1940. In addition, some features charted as reefs are, in some cases, dry at HW and wooded.

Makunudu Atoll is administred as part of Tiladummati Atoll.