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Creating and Using Navigation Routes
The last form of navigating to a destination with the
GPSCOM 170 is by creating a user-defined route. The
route navigation feature lets you plan and navigate a
course from one place to another using a set of pre-
defined waypoints. Routes are often used when it’s not
practical, safe or possible to navigate a direct course to a
particular destination (e.g., through a body of water or
impassable terrain).
Routes are broken down and navigated in smaller
segments called ‘legs’. The waypoint you are going to in a
leg is called the ‘active to’ waypoint, and the waypoint
immediately behind you is called the ‘active from’ way-
point. The line between the ‘active to’ and the ‘active
from’ waypoint is called the ‘active leg’.
Whenever you activate a route with the GPSCOM
170, it will automatically select the route leg closest to
your position as the active leg. As you pass each waypoint
in the route, the receiver will automatically sequence and
select the next waypoint as the ‘active to’ waypoint.
Route
Navigation
Reference
42
Waypoint 2
(‘active to’ waypoint)
Waypoint 1
(‘active from’ waypoint)
‘Active Leg’
170 manual pages rev D 9/21/98 9:23 AM Page 42