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Furuno TZT9 Manual

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6. RADAR
6-4
6.4 How to Reduce the Rain Clutter
When your ship is in or near rain or snow, the reflections from the rain or snow appear
on the screen. These reflections have the name “rain clutter”. When the rain clutter is
strong, targets in or near the rain clutter are hidden in the clutter. Reflections from the
rain clutter are easily identified from true targets by their wool-like appearance.
The rain control breaks the continuous display of rain or snow reflections into a ran-
dom pattern. The rain control also helps to reduce the target clutter in good weather
in busy harbors.
When the rain clutter hides targets, adjust the rain control (automatic or manual) to re-
duce the clutter. After the rain clutter is gone, turn off the rain control to prevent the
loss of targets.
Automatic rain clutter adjustment
1. Select [Radar Adjust] from the RotoKey menu.
2. Select [Auto Rain].
Manual rain clutter adjustment
1. Select [Radar Adjust] from the RotoKey menu.
2. Select [Manual Rain].
Note: If [Auto Rain] is checked, first deselect [Auto Rain].
3. Drag the circle icon to set the level.
You can switch the method of the rain clutter adjustment between automatic and man-
ual with the [RADAR] side menu at the left side of the screen. You can also adjust the
rain clutter from this side menu (see "[RADAR] side menu" in section 6.2).
6.5 Range Scale
The range setting controls the size of the area (in nautical miles, kilometers or statute
miles) that appears on your screen. The range and range ring interval appear at the
bottom left-hand corner of the screen.
How to zoom in or out the range scale
TZT9/TZT14: Rotate the RotoKey
TM
or pinch the radar screen.
Range
Range ring interval
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