Humminbird ] 981 Installation & Operation Manual page 5

98x_Manual_531376-1_A.qxd 2/23/2005
TABLE OF CONTENTS
Fish ID Sensitivity...................................................................................................................... 61
Real Time Sonar (RTS®) Window ........................................................................................ 61
Bottom View.............................................................................................................................. 62
Zoom Width
(Sonar Zoom View only)
50 kHz Sensitivity
(Advanced)
Depth Lines ............................................................................................................ 63
(Advanced)
Surface Clutter ...................................................................................................... 63
(Advanced)
Noise Filter ............................................................................................................ 63
(Advanced)
Max Depth ............................................................................................................ 64
(Advanced)
Water Type ............................................................................................................ 64
(Advanced)
Color Bar...................................................................................................................................... 64
Temperature Graph
(Sonar View only, with Temperature input)
Navigation Menu Tab
(987c SI Combo models only)
Tracks............................................................................................................................................ 66
Waypoints .................................................................................................................................. 66
Routes ........................................................................................................................................ 66
Chart Orientation .................................................................................................................... 67
North Reference........................................................................................................................ 67
Trolling Grid Rotation.............................................................................................................. 67
Trackpoint Interval.................................................................................................................... 67
Track Min Distance
(Advanced)
Map Datum .......................................................................................................... 68
(Advanced)
Export All Nav Data
(Advanced)
Delete All Nav Data
(Advanced)
Chart Menu Tab
(987c SI Combo models only)
Chart Detail Level .................................................................................................................... 69
Map Borders .............................................................................................................................. 69
Lat/Lon Grid .............................................................................................................................. 70
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Spot Soundings ........................................................................................................................ 70
Shaded Depth............................................................................................................................ 70
Set Simulation Position
(Advanced)
Set Map Offset ...................................................................................................... 71
(Advanced)
Clear Map Offset
(Advanced)
Alarms Menu Tab
Depth Alarm .............................................................................................................................. 72
Fish ID Alarm.............................................................................................................................. 72
Low Battery Alarm.................................................................................................................... 72
Temp Alarm ................................................................................................................................ 72
Off Course Alarm
(987c SI Combo models only)
Arrival Alarm
(987c SI Combo models only)
65
Drift Alarm
(987c SI Combo models only)
Alarm Tone.................................................................................................................................. 74
Setup Menu Tab
Units - Depth .............................................................................................................................. 75
Units - Temp
(International only)
Units - Distance
(With Speed Input only)
Units - Speed
(With Speed Input only)
User Mode .................................................................................................................................. 76
Language
(International only)
Triplog Reset
(With Speed Input only)
Restore Defaults........................................................................................................................ 76
Select Readouts
(Advanced)
69
Depth Offset .......................................................................................................... 78
(Advanced)
Temp Offset .......................................................................................................... 78
(Advanced)
Speed Calibration
(Advanced, with Speed Paddlewheel only)
Local Time Zone
(Advanced, 987c SI Combo models only)
iv
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