Humminbird 981 Navigation Menu T ab , Chart Menu Tab (987c SI Combo models only) 69, Alarms Menu Tab 71, Setup Menu Tab 74

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TABLE OF CONTENTS
Fish ID Sensitivity...................................................................................................................... 61
Real Time Sonar (RTS®) Window ........................................................................................ 61
Bottom View.............................................................................................................................. 62
Zoom Width (Sonar Zoom View only).................................................................................... 62
50 kHz Sensitivity (Advanced)................................................................................................ 63
Depth Lines (Advanced)............................................................................................................ 63
Surface Clutter (Advanced)...................................................................................................... 63
Noise Filter (Advanced) ............................................................................................................ 63
Max Depth (Advanced) ............................................................................................................ 64
Water Type (Advanced) ............................................................................................................ 64
Color Bar...................................................................................................................................... 64
Temperature Graph (Sonar View only, with Temperature input)...................................... 65
Navigation Menu Tab (987c SI Combo models only) 65
Tracks............................................................................................................................................ 66
Waypoints .................................................................................................................................. 66
Routes ........................................................................................................................................ 66
Chart Orientation .................................................................................................................... 67
North Reference........................................................................................................................ 67
Trolling Grid Rotation.............................................................................................................. 67
Trackpoint Interval.................................................................................................................... 67
Track Min Distance (Advanced).............................................................................................. 68
Map Datum (Advanced) .......................................................................................................... 68
Export All Nav Data (Advanced) ............................................................................................ 68
Delete All Nav Data (Advanced) ............................................................................................ 68
Chart Menu Tab (987c SI Combo models only) 69
Chart Detail Level .................................................................................................................... 69
Map Borders .............................................................................................................................. 69
Lat/Lon Grid .............................................................................................................................. 70
Spot Soundings ........................................................................................................................ 70
Shaded Depth............................................................................................................................ 70
Set Simulation Position (Advanced) .................................................................................... 70
Set Map Offset (Advanced) ...................................................................................................... 71
Clear Map Offset (Advanced) .................................................................................................. 71
Alarms Menu Tab 71
Depth Alarm .............................................................................................................................. 72
Fish ID Alarm.............................................................................................................................. 72
Low Battery Alarm.................................................................................................................... 72
Temp Alarm................................................................................................................................ 72
Off Course Alarm (987c SI Combo models only) .................................................................. 73
Arrival Alarm (987c SI Combo models only) .......................................................................... 73
Drift Alarm (987c SI Combo models only) .............................................................................. 73
Alarm Tone.................................................................................................................................. 74
Setup Menu Tab 74
Units - Depth.............................................................................................................................. 75
Units - Temp (International only) ............................................................................................ 75
Units - Distance (With Speed Input only) .............................................................................. 75
Units - Speed (With Speed Input only).................................................................................... 75
User Mode .................................................................................................................................. 76
Language (International only) ..................................................................................................76
Triplog Reset (With Speed Input only).................................................................................... 76
Restore Defaults........................................................................................................................ 76
Select Readouts (Advanced) .................................................................................................... 77
Depth Offset (Advanced).......................................................................................................... 78
Temp Offset (Advanced) .......................................................................................................... 78
Speed Calibration (Advanced, with Speed Paddlewheel only) .......................................... 79
Local Time Zone (Advanced, 987c SI Combo models only) ................................................ 79
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