Turning on the entire CS90 system for the first time
When the main CS90 units have been turned on individually, you can turn on the entire system for the first time. It is very important that this does not take place while the vessel is in dry dock. The transducer may be damaged if it transmits in open air.
In order to turn on the CS90 for the first time in a controlled manner, two tasks must be done simultaneously. Two persons are required.
•  One person must stay on the bridge in order to operate the CS90.
•  One person must stay in the sonar room to verify that the Transceiver Unit starts, and that the hull unit works properly.
Certain steps in the two procedures are location specific. The steps marked [Sonar room] are done in the sonar room. The steps marked [Bridge] are done on the bridge.
Note
Proper oral communication must exist between the bridge and the sonar room. In the event of problems or malfunctions:
1 Locate the Motor Protecting Switch (S301).
2 Set the switch to position OFF.
WARNING
The transducer may be damaged if it transmits in open air.