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1. Determine the guard zone (usually 360
degrees) with the guard alarm function.
2. Press the [MENU] key to open the menu.
3. Operate the trackball to select “7.
WATCHMAN” .
4. Press the [RANGE] key to select a trans-
mission interval.
5. Press the [MENU] key to actuate the
watchman mode. The indication “WATCH-
MAN” appears and the radar transmits for
one minute and then turns to stand-by,
and “ECHONOMY” lights.
Note: The antenna radiator does not rotate
in the “ECHONOMY” (stand-by) mode. How-
ever, the radiator rotates continuously dur-
ing the watchman mode.
6. The radar automatically starts transmit-
ting after the time selected at step 4 has
passed. It transmits for one minute ap-
proximately and examines the guard zone
for change.
(a) If the condition is unchanged, the ra-
dar automatically returns to stand-by
again and continues operating in the
watchman mode.
(b) If the condition differs from the previ-
ous one, the radar sounds an audible
alarm, cancels the watchman mode
and transmits continuously.
7. To cancel the watchman mode manually,
press any key.
2.26 Plotting
This function plots the movement of other
ships relative to your own ship.
Press the [PLOT (A/C RAIN)] control to start
plotting. The indication “PLOT” and a timer
appear at the top right-hand corner of the
screen and movement of all targets is plot-
ted. The timer counts up from 0:01 to 99:59,
whereupon the timer indication freezes but
plotting continues. Targets initially are up-
dated every 15 seconds. However, you can
select intervals of 30 seconds, 1 minute, 3
minutes or 6 minutes through the MENU dis-
play (Refer to Chapter 3). The plotting inter-
val (except for 15 seconds) appears to the
right of the indication PLOT.
If the range is changed during plotting, plot-
ting begins anew with the newly selected
range. To cancel plotting, press the [PLOT]
key.
0:25
PLOT
18:25
PLOT 3M
Timer
Plotting Interval
(30 sec., 1min.,3min., 6min.)
Figure 2-14 Plotting Indications
Plot Brilliance
The brilliance of plotted echoes is selectable
through the MENU display. Press the [MENU]
key and select “5. PLOT BRILLIANCE”.
2.27 Navigation Data Display
Navigation data can be displayed on the
screen if your radar receives navigation in-
put form a Loran-C, NNSS (satellite naviga-
tor) or GPS navigator whose output formats
is IEC 61162 or FURUNO CIF. Data
displayable include own ship’s position in lati-
tude and longitude (or Loran-C time differ-
ences (TDs)), bearing and range to a
waypoint selected on the nav aid, own ship’s
speed, heading and course, In addition, if a
heading sensor or gyrocompass is also con-
nected, a line connects a waypoint (selected
on navaid), denoted by a dashed ring, with
the own ship’s position.
To return the navigation data display on or
off, press the [MENU] key and select “8. NAV
DATA”.
To display TDs instead of L/L, press the
[GAIN] control. Press the control again to
restore L/L.