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course. As you come around the mountain and the pavement turns back
south, the compass rose, the route and the pavement will all line up to-
gether once again.
The off course alarm also requires some adjustment when using low res
routes. In our mountain curve example, if the alarm was set at 0.1 mile, it
would go off as we rounded the curve and "deviated" more than 0.1 mile
from the route center line.
Some navigators avoid this by turning the course deviation alarm off. With
the alarm off, however, you may take a wrong turn and it could be some
time before you catch the error. You can leave the alarm on if you simply
expand the distance setting that triggers the alarm. In our mountain high-
way example, setting the course alarm to 1.5 miles would keep the alarm
from going off as we rounded the mountain.
Highway route "resolution" is ultimately a matter of personal taste. Experi-
ment with these techniques to see which one suits you best. Most users
strike some sort of balance between them. Just remember: the more pre-
cise you are in following the turns of the pavement, the more waypoints
you will use. That, in turn, affects how your GPS features work with your
route.