Heading Line; How To Reduce Radar Interference - Furuno NavNet TZtouch3 Series Operator's Manual

6. RADAR
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Heading Line

The heading line indicates your heading in all orientation
modes. This line connects between your position to the outer
edge of the radar display. The line is at zero degrees on the
bearing scale in the head-up mode. The orientation of the line
changes in the north-up mode with the movement of your ship.
If it is hard to identify the echoes on the heading line, you can
hide the heading line and range rings for a few seconds. Open
the pop-up menu, then tap [HDG Line Off] to hide the heading
line and range rings. The heading line and the range rings re-
appear after approx. 5-6 seconds.
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How to Reduce Radar Interference

Radar interference can occur when your ship is near the radar of another ship that op-
erates on the same frequency band with your radar. The interference shows on the
screen in many bright dots. The dots can be random or in the shape of dotted lines
that run from the center to the edge of the screen. You can identify the interference
from the normal echoes, because the interference does not appear in the same loca-
tion at the next rotation of the antenna.
Turn off the interference rejector when there is no interference to prevent the loss of
weak targets.
To use the interference rejector, Open the [Layers] menu, then turn [Interference
Rejection] on or off.
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