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2-17
Delay time:Enter in minutes by hitting
numeral keys. This is the
time after which own ship
takes a new situation, not
the time the simulation
begins. Change the delay
time according to own
ship loading condition,
etc.
8. Press the TRIAL key again to start a
trial maneuver.
Trial maneuver takes place in three min-
utes with the letter "T" displayed at the
bottom of the screen. If any tracked tar-
get is predicted to be on a collision course
with own ship (that is, the target ship
comes within preset CPA/TCPA limits), the
target plot symbol changes to a triangle
(∆) and flashes. If this happens, change
own ship's trial speed, course or delay
time to obtain a safe maneuver. The trial
maneuver is automatically terminated and
the normal radar picture is restored three
minutes later.
Terminating trial maneuver
Press the TRIAL key again at any time.
2.16 ARPA Track Test
Test program is provided for assessing
ARPA overall performance. Note that nor-
mal operation is interrupted and the label
"XX" is displayed at the bottom of the
screen during this test. The Test may be
terminated at any moment.
To execute the ARPA track test:
1. Select north-up mode presentation on
the 12 nm range.
2. Enter manual speed of 0 knots.
3. Press the E, AUTO PLOT MENU key
on the plotting keypad followed by the
[0] key to show the ARPA 2 menu.
4. Press the [9] key to select 9 ARP
TRACK TEST. A track test picture ap-
pears on the screen.
5. Press the ENTER key.
6. It takes approximately three minutes
for all vectors to be displayed. The track
test display does not need echo sig-
nal, gyro nor speed log input. Seven
targets having various speeds and
courses, as shown in the table on the
next page, are simulated automatically.
7. The track test continues for 5 minutes
and then repeats.
To terminate the track test, press the ST-
BY/TX key twice and the ST-BY display
will appear.
CPA and TCPA shown below are initial
values.
tegraTesruoC
deepS
)tk(
APC
)mn(
APCT
)nim(
AtegraTT˚0.090.010.14.01
BtegraTT˚0.00.00.4*
CtegraTT˚0.0810.017.12.82
DtegraTT˚5.6128.329.00.51
EtegraTT˚5.3722.410.65.22
FtegraTT˚0.0810.020.00.03
GtegraTT˚6.426.510.46.34
eulavdilavnI*
F
C
B
A
G
E
D
XX
+
Note: Alphabets mark targets in the
above table and figure; on the actual dis-
play figures mark targets. Note that tar-
get numbering varies.