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The first part of the leg from March 4 to March 23 was to produce bathymetric and side-scan SONAR imagery of the seafloor to the volcanic arc and back-arc basin using the University of Hawaii, Honolulu, HMR1 towed SONAR instrument.

HMR1 stands for HAWAAII Mapping Research [Group] One. HAWAII itself is an anagram standing for ???