JRC JMA-9923-7XA User Manual

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5.7
ALARM
DISPLAY
The
ARPA system
provides
the following alarms:
Dangerous trarget alarm:
CPA/TCPA
Guard
zone
intrusion
alarm'. GZ
Lost target alarm:
LOST
System
function alarm: ARPA
(DATA)
Gyro
set alarm:
SET
GYRO
Dangerous
Target Alarm
:
(CPA/TCPA)
.'
CAUTION
lf
either
the
CPA
LIMIT or
TCPA
LIMIT
is set to
zero, then the
dangerous
target alarm
will
not operate.
Since these alarms
may include some errors
depending
on the
target
tracking conditions,
the
navigation
officer
himself
should
make the
final
decision
for ship
operations
such
as collision
avoidance.
In
the
ARPA system, targets are
categorized
into two
types:
tracked targets
and
dangerous
targets. The degree
of danger can
easily be recognized
on the display at a
glance,
so that
an
officer
can easily decide
to which
target
he should
pay
attention.
The
types
of targets and
alarms are shown
below.
Dangerous
Target
Alarm
Status
Symbol on
CRT
Alarm
characters
Alarm
sound
Conditions
Tracking
target
(oFF)
(oFF)
o
CPA>CPALIMIT
r
O>TCPA
.
TCPA>TCPA
LIMIT
Dangerous
target
u
CPA/
TCPA
Beeping
(pee-poh)
Acknowledgeable
.
CPA<JPA
LIMIT
O<TCPA<TCPA
LIMIT
CPA LIMIT
and TCPA LIMIT
The
setting
values
5-20

JRC JMA-9923-7XA Specifications

General

Brand	JRC
Model	JMA-9923-7XA
Category	Marine Radar
Language	English