Atoll
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An atoll is a ring-shaped island, including a coral rim that encircles a lagoon. There may be coral islands or cays on the rim. Atolls are located in warm tropical or subtropical parts of the oceans a
The atoll of Tetiʻaroa in French Polynesia
Penrhyn atoll
Nukuoro from space. Courtesy NASA
View of the coast of Bikini Atoll from above
Marshall Islands
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The Marshall Islands, officially the Republic of the Marshall Islands, is an archipelagic country in Oceania. The sovereign state lies west of the International Date Line and north of the equator in t
Atoll
…440 atolls in the world. Most of the world's atolls are in the Pacific Ocean (with concentrations in the Caroline Islands, the Coral Sea Islands, the Marshall Islands, the Tuamotu Islands, Kiribati, Tokelau, and Tuvalu) and the Indian Ocean (the Chagos Archipelago, Lakshadweep, the atolls of the Maldives, and the…
Marshall Islanders sailing, with sails brailed (reefed), c. 1899–1900
A Marshallese stick chart. Most were made from a grid of coconut frond midribs with small shells representing the relative location of islands.
Manila Galleon in the Marianas and Carolines, c. 1590 Boxer Codex
Offices of the Pacific Navigation Co. at Jaluit Atoll in the late 1880s