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2. RADAR OPERATION
2-19
2.15 Zoom
The zoom feature allows you to double the size of the area selected with the
zoom circle, which appears at the bottom right- or left-hand corner on the display.
The zoom feature is available on any range but is inoperative in true motion and
when the display is shifted.
2.15.1 Zooming in on radar targets
1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.
2. Press the ZOOM & D. BOX soft key to show ZOOM D. BOX soft keys.
3. Press the ZOOM ON/OFF soft key to select ON. A solid circle, called the
“zoom circle,” appears on the display.
4. Use the cursor pad to set the cursor where you want to zoom.
5. Press the CURSOR FLOAT soft key to fix the zoom cursor position. (The
solid circle changes to a dashed one.)
6. To release the cursor, press the CURSOR FLOAT soft key. (The dashed
circle changes to a solid one.) Relocate the zoom cursor, then press the
CURSOR LOCK key.
7. To quit the zoom function, press the ZOOM ON/OFF soft key to select OFF.
.250/ 319.9
°
M
.125nm
SP
H-UP
Zoom circle
Zoom window
+
001.0°R
0.160nm
ZOOM
D. BOX
ARPA
TGT ZM
RETURN
ZOOM
ON /OFF
D. BOX
ON/OFF
CURSOR
FLOAT
Requires optional
ARP Board in
1833/1833C series
network radar.
Not shown when
radar source is
otherwise.
Zoom
2.15.2 Zooming ARP, TTM targets
You may zoom in on TTM targets coming into the display. TTM targets can come
from a NAVNET connected RADAR, or from other ARP RADAR that is outputting
the TTM message. Note: TTM stands for Tracked Target Message. It is a NMEA
0183 data sentence that is an available output from some ARP capable RADAR.
TTM target numbers must be displayed to zoom in on tracked targets. This can
be done by enabling the target ID number option in the ARP setup menu.
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