JRC JMA-993-SA - Display of Vectors

oaaaoaoaaaaaaaaaaaoaaaaaaoooaaoooaaaaoo
5.5
ARPA
DATA DISPLAY
(Refer to the Display Example
on
page
2-1.)
Display
of
Vectors
Aftention
o
When a targeting
or the own ship changes course
or
when
a larget
is
acquired,
the
vector
may not reach
a
given
level
of accuracy until
three minutes or more
has
passed
after
such a course change or target acquisition.
Even if three
minutes or more have
passed,
lhe
vector
may
include
an error
depending
upon the tracking conditions.
A veclor
representing a target's
predicted position
can be
presented
in the TRUE vector
or RELATIVE
vector
mode.
In
each
mode,
a
vector length
can be
freely
changed
for
a time
int€rval of 1 to 60
minutes.
lU
Vector
Mode Selection
True
Vector Mode
In the true vector
mode, the direction of a target vector
indicates the true
course
of
lhe
target and
its veclor
length is
proportional
to its
speed.
In
this
mode, the own
ship's vector is displayed
as shown
below.
In this
mode,
the
movements
of other ships around own ship
can be
accurately
and easily
monitored.
However,
no
CPA
RING
can be displayed in this
mode.
5-13
Own ship's
vector
The relative
vector is not displayed.