Page 35: of Marine Technology Magazine (November 2019)

LEFT: A REMUS vehicle shows the traditional four-element DVL array. device measures the motion of water in 1997. This capability unleashed the ? owing past it. When mounted in a sta- modern era of current measurement. In tionary buoy, or on the sea? oor, it pro- the decades since, oceanographers and vides a measure of the water current. ocean engineers have employed these

Alternatively, when mounted in a mov- tools in a variety of con? gurations and ing platform such as an undersea vehi- thousands have been delivered. But cle the instrument can measure motion what have the last few years brought to relative to the water, or the sea? oor. the ? eld?

This is known as a Doppler velocity log As the ADCP/DVL ecosystem has (DVL). The ? rst patents on the most matured there have been many innova- capable broadband ADCPs were issued tions. Recently, leading manufacturers

BELOW: The compact ECO ADCP.

Photo: Nortek www.marinetechnologynews.com

MTR #9 (34-49).indd 35 12/2/2019 11:14:46 AM