The Geophysics Mapping Platform (GeMaP) is provided by the African Coelacanth Ecosystem Programme (ACEP) on a competitive basis. It is based around a Teledyne Reson SeaBat 7101 multibeam echosounder and SBG Systems Navsight Apogee inertial navigation system.
By means of a pole, the Seabat 7101 transducer is deployed off the side of the boat to send sound pulses down to the seabed and then listen for an echo. Each echo is a measurement of range (two-way-travel time) across 512 beams (soundings). The boat sails up and down over a region of seabed sending pulses and receiving echoes via the multibeam transducer. With hundreds of thousands of soundings, a bathymetric (measurement of water depth) chart of the seafloor can be created. Using this platform, large areas of the seabed can be mapped in three dimensions and at high resolution.