Ocean Instruments 24″ sheave counter is ideal for survey vessel operations where tracking the depth of equipment deployment is critical. The 24″ sheave is designed for data cable with a larger bend radius. Ideally suited for our tow video sled and winch system or for a sidescan sonar. The sheave consists of a remote interface display which allows tare, unit (ft or meter) options and easy calibration of the counter via bluetooth. The system is mobile and light weight.