2022 Expedition
The Johnston Atoll Unit of the Pacific Remote Island Marine National Monument (PRIMNM) was expanded by 150 nautical miles in 2014, encompassing many more ridge and seamount features that were previously unmapped and uncharacterized.

Johnston Atoll Mapping

May 25 – June 18, 2022
NA140
Expedition Leader

This 24-day expedition will involve multibeam and sub-bottom profiler mapping to reveal the seafloor within the Johnston Atoll Unit of Pacific Remote Island Marine National Monument (PRIMNM). Johnston Atoll, one of the most isolated atolls in the world, is located in the central Pacific Ocean, between the Hawaiian Islands and the Line Islands. The main objective of this expedition will be to collect high-resolution seafloor bathymetry data where it has not been previously collected. In 2014, the boundaries of PRIMNM expanded encompassing a large seafloor area which was unmapped. Discoveries and data revealed on this expedition will inform planning for ROV dives on a follow-on expedition examining areas of prime deep sea coral and sponge habitat.

This project will directly support the National Strategy for Ocean Mapping, Exploring, and Characterizing the United States Exclusive Economic Zone by contributing to mapping the deep waters of the US EEZ, a top priority of the Ocean Exploration Cooperative Institute.

This expedition is funded by NOAA Ocean Exploration via the Ocean Exploration Cooperative Institute.

Expedition Partners

Meet the Team