Owner's Manual
Alarms Tab ............................................................................. 70
Calendar Tab .......................................................................... 72
Celestial Tab........................................................................... 73
Message Tab .......................................................................... 77
Display Tab............................................................................. 78
Sound Tab .............................................................................. 79
Setup Tab ............................................................................... 80
Setting Up and Using Sonar .............................................89
Showing Sonar on the Map Page ......................................... 89
Using the Sonar Page ........................................................... 90
Setting Up Sonar ................................................................... 94
Understanding Sonar ............................................................ 98
Appendix ..........................................................................101
Specications ...................................................................... 101
Optional Accessories .......................................................... 102
Installation Information ....................................................... 103
Satellite Information ............................................................ 107
What is Differential GPS (DGPS)? ..................................... 107
LORAN TD Setup ................................................................. 109
Map Datums and Location Formats ...................................111
Digital Selective Calling (DSC) ........................................... 112
Messages ............................................................................. 114
Data Field Options ............................................................... 116
Software License Agreement ............................................. 118
Product Registration ........................................................... 118
Limited Warranty ................................................................. 119
FCC Compliance .................................................................. 120
Declaration of Conformity (DoC) ....................................... 120
Index .................................................................................121
GPSMAP 276C Owner’s Manual iii
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