Also in the Mozambique Channel is Banc du Geyser, a mostly submerged reef considered a part of the Glorioso Islands by France and the Comoros.

Each of the islands, except Banc du Geyser and Bassas da India, has an airstrip of more than 1,000 metres (3,300 ft).

France maintains a military garrison of around 14 troops on each of the islands[citation needed] in the Mozambique Channel that are claimed by Madagascar.

The troops are supported by French naval vessels based in Réunion conducting patrol missions and re-supply operations about four times per year.

The Comoros also claims the Glorioso Islands (including Banc du Geyser), as a part of the disputed French region of Mayotte.