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7
Getting Started
The Reference Manual will describe the Main Display Pages and their options
in detail. The Quick Start Guide described the process of navigating the Main
Display Pages and the Option Menus. While the Reference Manual will provide
some direction on how to select an item, its main intention is to describe each
Main Page and it’s Option Menu in detail.
Initializing the GPS Receiver
Before the GPSMAP 76S can be used for GPS navigation, the GPS receiver
must be initialized. The GPS receiver should only need to be initialized the fi rst
time the unit is used, or if it has been stored several months.
The GPSMAP 76S stores orbital data for each satellite in an Almanac. The
orbital data is supplied in the satellite signals. Each time the unit receives satellite
signals, the Almanac is updated. This is how the GPSMAP 76S knows which
satellites to search for. If you do not use your GPS for several months, or move
the unit several hundred miles between uses, the Almanac can become “cold”,
that is to say that the orbital information is no longer valid. If the Almanac is
“cold”, your unit may have trouble locking on to satellite signals. If the unit is
unable to receive enough satellite signals to determine its location, it will display
an options menu.
Initializing the GPS Receiver:
1. With fresh batteries installed, take the unit outside where a clear 360° view
of the sky can be obtained.
2. Turn the unit on and hold it in front of you with the top of the unit
tilted upward. Follow the screen prompts, pressing PAGE to display the GPS
Information Page.
3. The initialization process is automatic. It should take the GPSMAP 76S
no longer than fi ve minutes to acquire enough satellite signals to become
operational. When the unit is able to navigate, it will display either “2D GPS
Location” or “3D GPS Location” in the Receiver Status Field.
Reference
Initializing the GPS Receiver
When initializing the receiver or trying to receive satellite
signals, orient the GPSMAP 76S so the top of the unit
points toward the sky. If the unit is held with the top of the
unit pointed toward the horizon, satellite reception may be
severly degraded.
Point top of unit toward sky
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