6. RADAR
6-6
Head-up
A display without azimuth stabilization in which the
line that connects the center with the top of the
screen indicates your heading. Targets are shown
at their measured distances and in their directions
relative to your heading.
North-up
Targets are shown at their measured distances
and their true (compass) directions from your ship.
North is at the top of the screen. The heading line
changes its direction according to your heading.
6.8 How to Measure the Range and Bearing from
Your Ship to a Target
You can measure the range or bearing to a target by the following four methods.
6.8.1 How to display the range rings
The range rings are the concentric solid circles about your ship. Use the fixed range
rings to get a rough estimate of the range to a target.
To show or hide the range rings, open the [Layers] menu then turn [Radar Rings] on
or off.
To measure the range with the range rings, count the number of rings between the
center of the screen and the target. Check the range ring interval and estimate the dis-
tance of the echo from the inner edge of the nearest ring.
Range
measurement
Bearing
measurement
EBL (Electronic Bearing Line) No Yes
Fixed range rings Yes No
Ruler Yes Yes
Tap Yes Yes
VRM (Variable Range Marker) Yes No
Heading line