Chapter 3-18 CR44/54 Radar menu
VRM (Variable Range Marker) - bearing and distance (read-only)
from ship’s position to VRM cursor. Two independent VRMs are
available - see section 3.2.6.
Cursor - bearing and distance (read-only) from ship’s position to
cursor.
Trails after targets – toggle between OFF, 30sec, 1min, 2min,
5min, 10min, 15min, 30min, PERM (permanent). See also Glossary.
Own trail – toggle between OFF and ON.
RR = RangeRings – toggle between # *.** (as display example), *.**
(no RR figures), OFF (no RR)
GZ (Guard Zone alarm) –can be set OFF / IN / OUT –see also Glos-
sary. Define your “comfort” zone by means of the EBL and VRM
markers.
Procedure: Use cursor to go to EBL1 and set the EBL line with +/-
keys – this is the first “wall” of the guard zone. Go to EBL2 and set
the second “wall”. Then go to VRM1 and set the top/bottom “wall”
with +/- keys. Go to VRM2 and set the second of the top/bottom
“wall”.
Then go to GZ and choose:
IN = the alarm will be activated if any target enters the defined
guard zone.
OUT = the alarm will be activated if a target leaves the defined
guard zone i.e. a target must be present inside the GZ when the func-
tion is activated.
And lastly, go back to EBL1, EBL2, VRM1 and VRM2, and clear all
four settings by pressing the [CLR] key from the value of each. This
will give a better view of the defined guard zone.
The guard zone is not available in the secondary radar display in
Dual Radar mode.
IR (Interference Rejection) – toggle between ON and OFF, see sec-
tion 3.1.10.
Stretch – toggle between OFF, Auto, Pulse and Video.
Auto: the radar system will choose the optimum solution.
Pulse: will select the nearest longer pulse length on the screen, so
the weaker targets far away will be enlarged.
Video: all targets will be enlarged.
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