Sonar Surveys Improve Seafloor Maps of the Main Hawaiian Islands

Nearshore bathymetric surveys are conducted with the 25-ft 
            R/V AHI.
Nearshore bathymetric surveys are conducted with the 25-ft R/V AHI.

In response to a request from the State of Hawaii and the University of Hawaii School of Ocean and Earth Science and Technology (SOEST), a team of mapping specialists from the Center’s Coral Reef Ecosystem Division conducted bathymetric surveys in areas of the main Hawaiian Islands where proposed undersea energy transmission cable routes could impact Hawaii's nearshore coral reef resources.

Using the 25-ft survey launch R/V AHI, the PIFSC team deployed multibeam sonar around the islands of Oahu, Moloka'i, Lana'i, and Maui between May 22 and June 15 at bottom depths of 5-100 m. Data collected during the survey filled critical gaps in previous multibeam coverage and completed seafloor mapping around northeastern Oahu and the area between Molokai and Lanai.