Motion sensor
An omni sonar term, in plain English.
Measures the boat's roll and pitch so the sonar can stabilize its beam. Standard on the CSH-10 (CSH-1042).
See it in action
The free lessons show where this shows up on a real screen: start with the learning path, try it yourself on the omni trainer, or look it up on real CSH-10 captures in the field guide. Owners and captains talk settings every day on the forum.