Filter
Top Products
Introducing snapshots
. . . . . . . . . . . . . . . . . 46
Setting up the video image overlay
. . . . . . . 49
6 Reviewing past echoes using SoundTrac
. . . . . 51
Viewing past echoes using SoundTrac
. . . . . 52
Marking fish as waypoints
. . . . . . . . . . . . . . 53
Navigating to a past echo position
. . . . . . . . 53
7 Setting the Alarms
. . . . . . . . . . . . . . . . . . . . . . . . . 55
Understanding the alarms
. . . . . . . . . . . . . . 56
Setting the fish alarm
. . . . . . . . . . . . . . . . . . 56
Setting the bottom alarm
. . . . . . . . . . . . . . . 58
Setting the temperature alarm
. . . . . . . . . . . 60
8 Troubleshooting 491 Operations
. . . . . . . . . . . . 63
Troubleshooting the echo sounder
. . . . . . . 64
Checking the transducer
. . . . . . . . . . . . . . . 65