Procedures 1 Put the cursor on IR at the lower left of the screen and press
[ENTER] key.
The interference rejection modes are switched.
IR OFF IR LOW IR MEDIUM IR HIGH IR OFF
Rejection levels of the interference rejection
IR OFF: Interference rejection off
IR LOW: Interference rejection level - low
IR MEDIUM: Interference rejection level - middle
IR HIGH: Interference rejection level - high
When a high interference rejection level is selected, the radar’s ability of detecting small
targets such as buoys and small boats lowers.
In general, [IR LOW] should be selected.
3.4.9 Hide/Display Range Rings [RANGE RINGS]
Procedures 1 Press [RANGE RINGS] key.
The range rings are switched to On or Off.
3.4.10 Hide Ship’s Heading Line (HL OFF)
Procedures 1 Hold down [HL OFF] key.
The ship’s heading line is hidden while [HL OFF] key is held down.
The ship’s heading line (HL) that presents the course of own ship is always shown on the radar
display. The heading line is hidden while [HL OFF] key is held down, so the targets below the
heading line can observed easily.
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