Picture of Three Acoustic Doppler Velocity Meters

Three acoustic doppler Velocity meters (ADVMs) that have different frequencies. The ADVMs are raised out of the water for servicing.

This picture shows three acoustic doppler Velocity meters (ADVMs). Two of the ADVMS are mounted horizontal across the top of their mount. The third ADVM is in the middle below the two ADVMS on this same mount and is oriented perpendicular to the two horizonal ADVMs. The mount is attached to a rail, so the mount and attached ADVMs can be moved up and down through the water column and out of the water column to be serviced which this picture is illustrating. There is a metal ladder, cables, and two conduit lines behind the ADVM on the right side.