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Reference
Map Page
Map Page
The GPSMAP 188/188C/238 Sounder’s Map Page provides a comprehensive display of electronic
cartography, plotting and navigational data. When using the unit with the optional BlueChart data or
MapSource software, the map display 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 displays
any routes and waypoints you create. An on-screen cursor lets you pan and scroll to other map areas,
determine the distance and bearing to a position, and perform various route and waypoint functions.
The ZOOM IN and ZOOM OUT keys, combined with the ARROW KEYPAD, let you select
zoom ranges and move the cursor. The map scale displays at the bottom right of the page.
Two basic map operating modes, position mode and cursor mode, determine what cartography is
shown on the map display. Position mode pans the cartography to keep the present position marker
(triangle) within the display area, while cursor mode pans the cartography to keep the cursor (arrow
pointer) within the display area. The GPSMAP system will always power up in position mode, with
your vessel centered on the map display. When the ARROW KEYPAD is pressed, the GPSMAP 188/
188C/238 Sounder will enter cursor mode.
When the cursor is active, an additional data window appears below the data fi elds to indicate the
position, range and bearing to the cursor or a selected waypoint or map item.
Using the Cursor
The cursor allows you to pan away from your present position and scroll to other map areas
around the world. As you pan past the edge of the current map display, the screen actively scrolls
forward to provide continuous map coverage Keep in mind that the boat icon (triangle marker) moves
with the scrolling map, and may not be visible on the display screen.
NOTE: When the cursor reaches the edge of the map, the unit map pause as it load
new data.
Data Fields
Map Scale
Land
Water
Geographic
Name
Cursor
Map Page (shown in cursor mode and using
optional MapSource data).
)
Navaids
188188C238 Manual Part 1.indd 22 6/30/2003, 3:34:36 PM