Navigation - Garmin GPSMAP 230 Owner's Manual

GETTING STARTED
Navigation Page
A B
A. In this example, our boat is off course to the left
by about 1/16th of a mile (the base of the high-
way map is equal to the scale selected at the bot-
tom right of the page). To get back on course,
steer right.
B. In this example, our boat is off course to the right.
To get back on course, steer left. A digital readout
of your exact crosstrack error can be displayed in
any of the six data fields (see page 29).
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Now that we're navigating to an actual destination, let' s move on to the next
page of the GPSMAP 230 system, the Navigation Page:
1. Press the key.
Graphic
Compass Tape
Graphic
Highway
Pointer to
Waypoint
The Navigation Page provides graphic steering guidance to your destination.
The bearing (BRG) and distance (DIS) to the destination, with your current
course (COG) and speed over ground (SOG), are displayed at the top of the
page, along with a graphic compass to indicate your cardinal heading. The esti-
mated time enroute (ETE) and velocity made good (VMG, or the rate you are
closing in on your destination) are displayed at the bottom of the page.
As you head toward the destination, the middle section of the page gives you
visual guidance to your waypoint on a graphic highway, which displays the
route and nearby waypoints on screen. The moving arrow below the highway
always points to the destination waypoint relative to the direction you're moving.
The line down the center of the highway represents your desired track, while the
bottom of the page provides a graphic indication of your crosstrack error (the
distance and direction you are off course) according to the scale at the bottom
right of the page.
Data
Fields
CDI
Scale