Archipelago
An archipelago, more simply known as an island chain, chain of islands, or island group, was a collection of islands concentrated in a localized region of an ocean. 

The unidentified planet that the Retellian escape pod carrying  and First Monarch Kaitaama flew towards in 2153 consisted primarily of water, but had a chain of islands located near the equator that Tucker piloted towards for them to land on. ()

The hydrothermal pools of Ren-gham were located by a lava tube near an adjacent pyroclastic debris field on the polar island chain, 227 kilometers from the southern tip of the Rykos shoreline of an unidentified planet. ()

The bulk of radiation that leaked from an unnamed garbage scow that threatened Gamelan V in 2367 was projected to affect three small sparsely populated island groups on the planet. ()

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Landforms