Garmin 378 Manuale Proprietario

The location of each available satellite is shown over two location rings 

on the Satellite Information Page. The outer ring represents the horizon, 

the inner ring represents 45° above the horizon, and the center represents 

directly overhead. When the unit is using a satellite for navigation, the 

satellite number is highlighted on the location rings. The unit can display 

satellite location with North or your current track at the top of the display. 

The Satellite Strength Indicator Bars show the strength of the signal being 

received and the status of the signal. The bars are either shaded or filled. A 

hollow gray bar means the unit is in the process of storing orbital data it is 

receiving from the satellite signal. When the bar turns solid green, the unit 

is using the satellite signal for navigation. A “D” in or above the bar means 

differential corrections (WAAS or DGPS) are being applied to that satellite.

The unit gets date and time information from the satellite’s on-board atomic 

clock. When the unit has achieved a 2-D or 3-D GPS location, the current 

location is shown in the location format you have selected.

The United States and Canadian governments (among others) have set up 

Differential GPS (DGPS) stations to transmit correction signals. They are 

operational in coastal areas and on many navigable river systems. 
The DGPS system is available for use without a fee, but you do need 

additional equipment to receive DGPS signals; a beacon receiver 

compatible with the RTCM format sentences supported by your Garmin 

GPS is needed to use DGPS.
Refer to the United States Coast Guard’s Web site (

for locations and status of the differential stations

. 

Differential receiver status is indicated in the bottom left field of the GPS 

tab and will show one of the following conditions:

•  None—no optional beacon receiver is attached or enabled in 

the Interface sub tab on the Main Menu—Setup tab or WAAS 

is disabled.

•  Searching for WAAS—WAAS is enabled and the receiver is 

searching for WAAS signal.

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