Eagle Electronics 640C, 640cDF Fish Finder User Manual


 
90
Pages
The unit has four Page displays: Satellite Status Page, Navigation Page,
Map Page and Sonar Page. They are accessed by pressing the
PAGES key,
then using to select a Page. Clear the Pages Menu by pressing
EXIT.
Map Page display options.
Sonar Page
The Sonar Page displays the sonar chart, a view of the water column
from the surface to the bottom. The chart scrolls across the screen from
right to left, displaying echoes that represent fish, structure and the
bottom. The Sonar Page is discussed in detail in Sec. 3. To get to the
Sonar Page press the
PAGES key, then use to select SONAR.
Satellite Status Page
The Satellite Status Page, shown in the following images, provides de-
tailed information on the status of the unit's satellite lock-on and posi-
tion acquisition. To get to the Satellite Status Page press the
PAGES
key, then use to select STATUS.
No matter what Page you are on, a flashing current position indica-
tor/question mark symbol and flashing GPS data displays indicate sat-
ellite lock has been lost and no position is confirmed. The Satellite
Status Page shows you the quality and accuracy of the current satellite
lock-on and position calculation.
WARNING:
Do not begin navigating with this unit until the numbers
have stopped flashing!