Rapport sur l’utilisation du sondeur multifaisceaux ME70 lors de la campagne IBTS2010

The Simrad ME70 multibeam echosounder has been operated in the Eastern Channel during the IBTS2010 sea survey (14-26/01/10). The objectives were: i) to observe dense night-time herring aggregations ii) to record ME70 data in fisheries research mode during demersal trawling to further test the interest of ME70-derived bathymetric indicators for demersal habitats characterisation iii) to acquire night-time acoustic data of sound scattering layers and compare them with synoptic mesopelagic trawls results i) to test the integration of a sidewards looking echosounder (Simrad ER60 120kHz, 2.5x10°) in the R/V acoustic data recording system.