Garmin GPSMAP 172C - Manual (Page 25)

Highway Page
The GPSMAP 172/172C’s Highway Page also provides graphic steering guidance to a destination
waypoint, placing greater emphasis on the straight-line desired course and the distance and direction
you are off course. As you head toward your destination, the middle of the screen provides visual guid-
ance to your waypoint on a moving graphic “highway.” Your present position is at the bottom center of
the highway display. The line down the middle of the highway represents your desired course.
As you navigate toward a waypoint, the highway actually moves—indicating the direction you’re
off course. To stay on course, simply steer toward the center of the highway or “keep it on the road”.
The default data fields at the top of the page indicate ‘Speed’ and ‘Distance To Next’ point, along with
‘To Course’ which shows the bearing to get you back on course and ‘Time To Next’ point. Use the High-
way Page as your primary navigation page (in lieu of the Compass Page) when your main concern is
following a defined course.
Whenever the GPSMAP 172/172C is in simulator mode, you can also adjust your speed and course
from the Highway Page using the ARROW KEYPAD. As you head toward each waypoint in the tour
route, try adjusting your boat speed and course to get a feel for how the Highway Page works.
To adjust the simulated boat speed/heading from the Highway Page:
1. Press the UP arrow of the ARROW KEYPAD to increase the speed in 10 knot/kph/mph increments.
Press the DOWN arrow to decrease the speed in the same increments. Press the LEFT and RIGHT
arrows of the ARROW KEYPAD to steer the boat.
Notice that as you get off course, the highway moves to give you graphic guidance to get back on
course. You can zoom in or out on the Highway display for a smaller or larger view. Five available set-
tings range from 1X to 16X, with a default setting of 8X. The current scale appears in the bottom right
of the display.
To zoom in or out on the highway display:
1. Press either the IN or OUT key to increase or decrease the zoom scale.
Highway Page
Current
Destination
Data
Fields
Desired
Course
Present
Position
Zoom
Scale
Steer towards the center of the highway to get back
on course.

Getting Started
Highway Page