JRC JMA-9923-9XA User Manual

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Display of
Past
Positions
IPAST
POSN]
Press the
[PAST
POSN] switch to display the
past position
of targets.
A maximum of six
past
positions
for each
target can
appear. Every
time the
IPAST
POSN]
switch
is
pressed,
the
time
interval is changed
between
O.5, 1,2 and
4 minutes. When the
interval
is
4
and
the switch
is
pressed
again,
the
past posilions
on display
will
be
turned
OFF.
The
interval
is displayed under PAST POSN
in the
ARPA information
screen. When OFF is
displayed,
the
past
position
display
is turned
off.
The trail
mode is interlocked
with
the
vector mode
to allow
the
past
positions
of a
target
to appear
in
the
True
or
Relative
Vector
mode.
In the Relative
Vector
mode,
the target's relative
past positions
are
displayed.
ln the
True
Vector mode, the
target's
true
past
positions
are
displayed
after
calculating
them from
its relative
bearing
and
range,
and
the course
and
speed ofthe
own
ship.
Fig. 5-2 shows
an
example
of a screen,
and
Table
5-1 shows
the meanings
of
the symbols on
the radar
screen.
Lost target
into the
Trackball
Dangerous target
(Cursor)
Past
positions
Untracked
NAV line
Past Positions
Safe
target
Fig. 5.2
Example
of
Display
(ln
North Up and True
Vector
Mode)
ln addition to the
marks
and symbols
shown
above,
fixed/variable range
markers,
eleclronic
bearing
lines and other
symbols
are
shown
in
an
actual
image.
Guard
zone
(Straight
course)
i.q
il
5-16

JRC JMA-9923-9XA Specifications

General

Brand	JRC
Model	JMA-9923-9XA
Category	Marine Radar
Language	English