Garmin gpsmap 198c sounder User Manual

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The GPSMAP 198C Sounder’s Map Page provides a 

comprehensive screen of electronic cartography, plotting, and 

navigational data. When using the unit with optional BlueChart or 

MapSource data, the Map Page shows your boat on a digital chart, 

complete with geographic names, map items, navaids, and a host of 

other chart features. It also plots your track and shows any routes 

and waypoints you create. The map pointer allows you pan and 

scroll to other map areas, determine the distance and bearing to a 

location, and perform various route and waypoint functions.
When the map pointer is active, an additional data window appears 

below the data fields to indicate the location, range, and bearing to 

the pointer, a selected waypoint, or map item. The map zoom range 

shown at the bottom right of the page. 
The Zoom IN and OUT keys combined with the ROCKER, 

allows you select zoom ranges and move the pointer. Two basic 

map operating modes, Position Mode and Pointer Mode, determine 

what cartography is shown on the Map Page. Position Mode moves 

the cartography to keep the present position marker within the 

screen area. Pan Mode moves the cartography to keep the map 

pointer within the screen area.

Data Fields

Position Triangle

Map Zoom Range

Land 

Water

Geographic

Name

Map Item

Navaids

User Waypoint

Map Page shown using 

optional MapSource data.

The GPSMAP 198C Sounder system starts in the Position Mode, 

with your location centered on the Map Page. When sufficient 

map coverage is not available to keep your location centered, the 

position triangle moves toward the edge of the screen.
Pan Mode starts when the ROCKER is pressed. The pointer is 

moved over the Map Page using the ROCKER. When the pointer 

reaches the edge of the screen, the map scrolls forward under the 

pointer.