The hydroacoustic surveys carried out during MARIA S. MERIAN cruise MSM86 were aimed to acquire detailed information of the areas of interest (Boyd Seamount; Logi Ridge; Vesteris; Vestnesa Ridge) with respect to backscatter and bathymetry. The shallow to medium water Kongsberg EM 712 multibeam echosounder system was only operating in water depths above about 1000 m. Hydroacoustic surveys were usually conducted with a vessel speed of maximum 6 kn, while for some few sub-bottom profiles, a reduced speed of about 4 kn was applied. During transits the vessel speed was increased to 8-12 kn, depending on weather conditions. Sound velocity profiles were uploaded into the recording system online. Data has been processed according to the MB-System standard processing sequence.

These data should not be used for navigational purposes