NorthStar 958 Operator's Manual page 58

Chapter 4 - Using the Chart Screen
Page 50
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Heading-up - This angle is available only if you have
radar installed and enabled. Heading-up shows the radar
heading, which may not be identical to the
course-over-ground. When you select heading-up, the
heading line on the radar image points straight upwards.
The heading line allows you to compare the radar view
with the view in front of the vessel.
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Leg-up - You'll see your vessel's current leg to a
waypoint—whatever direction that is—pointing straight
upwards. The 958 will adjust the chart on a leg-by-leg
basis, so the chart turns accordingly whenever you start
navigating on a new leg, even if you haven't turned the
vessel yet. Exception: If you select leg-up when you aren't
currently navigating, the 958 automatically uses
course-up—until you start navigating along another leg.
If you're viewing course-up, heading up, or leg-up, the text
from the Navionics cartridge is tilted to match the rotation
angle in order to avoid text overlap.
You can change the chart rotation right on the CHART screen
by pressing the ROTATE key.
The following three screens show how the chart looks if you're
travelling along a sample route that has four waypoints, and
you rotate the chart from north-up to course-up and then to
leg-up.
Figure 1: North-up chart angle (first leg going northwest)
958 Operator's Manual, Rev. A