Garmin 278 Setting Up and Using Sonar .............................................90, Appendix ..........................................................................102, Index .................................................................................125

Display Tab.............................................................................79
Sound Tab ..............................................................................80
Setup Tab ...............................................................................81
Setting Up and Using Sonar .............................................90
Showing Sonar on the Map Page .........................................90
Using the Sonar Page ...........................................................91
Setting Up Sonar ...................................................................95
Understanding Sonar ............................................................99
Appendix ..........................................................................102
Specications ......................................................................102
Optional Accessories ..........................................................103
Installation Information .......................................................104
What is EGNOS/WAAS/MSAS? ..........................................109
LORAN TD Setup .................................................................109
Map Datums and Location Formats ...................................111
Digital Selective Calling (DSC) ...........................................112
Declaration of Conformity (DoC) .......................................117
Messages .............................................................................118
Data Field Options ...............................................................120
Software License Agreement .............................................122
Product Registration ...........................................................122
Limited Warranty .................................................................123
FCC Compliance ..................................................................124
Index .................................................................................125
GPSMAP 278 Owner’s Manual iii
IntroductIon > tAble of contents