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5
Getting Started
Initializing the Receiver
To graphically initialize the GPSMAP 178/178C Sounder:
1. Press the MENU key twice for the Main Menu. Press Up or Down on the ARROW KEYPAD until the
‘GPS’ tab is highlighted, then press the MENU key once.
2. Using the ARROW KEYPAD, highlight ‘Initialize Position’ and press ENTER to initialize the receiver
from the map. The Initialize Position Page appears, prompting you to select your
approximate location with the map cursor.
3. Use the ARROW KEYPAD to move the map cursor and point to your approximate location within
200 miles. If you have difficulty identifying your position, press and release the IN key to see the next
lower map scale.
4. Once you have determined your approximate location on the map, press the ENTER key.
NOTE: This does not “calibrate” the unit in any way, but rather helps to speed up the
initial satellite acquisition. If the unit displays “Ready (2D) or (3D )” during this
process, it is not necessary to initialize the unit.
The GPS Information Page appears as the receiver begins acquiring satellites for your region and
should acquire a fix within a few minutes. When viewing the ‘GPS’ tab on the Main Menu, a signal
strength bar for each satellite in view appears on the bottom of the page, with the appropriate satellite
number under each bar. The progress of satellite acquisition is shown in three stages:
• No signal strength bars— the receiver is looking for the satellites indicated.
• Hollow signal strength bars— the receiver has found the indicated satellites and is collecting data.
• Solid signal strength bars— the receiver has collected the necessary data and the satellites are ready
for use.
Once the receiver has collected information from at least three satellites, the top of the screen dis-
plays either “Ready (2D or 3D)”, and the GPSMAP 178/178C Sounder is ready for use.
I
Point to your approximate loca-
tion and press ENTER/MARK.
A satellite’s strength bars turns
green when it’s ready for use.