Description: INFOMAR Bathymetry Data. The term bathymetry refers to the ocean's depth relative to sea level, it can also be used to describe submarine topography or underwater terrain. INFOMAR bathymetry data is measured primarily by multibeam (MBES) and levelled to lowest astronimical tide using the Vertical Offshore Reference System (VORF). MBES transducers transmit multiple high frequency pulses of sound in a fan shape beneath the vessel, enabling a large swath of seabed to be mapped at high resolution as the vessel moves along. The time taken for the sound to travel to and be reflected from the seabed back to the ship provides the water depth. Sound velocity profiles are taken to calibrate systems as data acquisition is ongoing.
Definition Expression: N/A
Copyright Text: Please reference INFOMAR when the data is used in publications & presentations.