NorthStar Navigation Echo Sounder NorthStar 491 - Manual (Page 67)

491 Echo Sounder Operations Manual Page 63
8
Troubleshooting 491 Operations
Troubleshooting the echo sounder . . . . . . . 8-64
Checking the transducer . . . . . . . . . . . . . . . . . . 8-65
T
his chapter explains how to troubleshoot the echo sounder
system before returning the equipment for factory service.