Alarms - Furuno ARP-17 Operator's Manual

OTHERS
1. HDG SET
2. SPD MODE
3. MAN SPD
4. SET & DRIFT
5. DISPLAY
6. MARK/LINE
7. TUNE
8. NAV DATA
9. EBL/VRM/+
0. ↓
* NAV shown on R-type only.
Figure 9 OTHER menu
2. Press the [4] key twice to select SET/
DRIFT.
SET & DRIFT
1. ↑
2. SET/DRIFT
3. SET
4. DRIFT
Figure 10 SET/DRIFT menu
3. Press the [2] key to select ON from the
SET DRIFT field, and then press the [EN-
TER/SELECT] key.
4. Press the [3] key twice, enter SET value,
and then press the [ENTER/SELECT]
key.
5. Press the [4] key twice, enter DRIFT
value, and then press the [ENTER/SE-
LECT] key.
6. Press the [MENU] key.
10
MAN LOG NAV*
LOG (S-BT)
LOG (S-WT)
OFF ON
000.0
0-19.9 KT

12. Alarms

CPA/TCPA alarm
Visual and audible alarms are generated
when the predicted CPA and TCPA of any
target become less than their preset limits.
Press the [AUDIO OFF] key to acknowledge
and silence the CPA/TCPA audible alarm.
The ATA continuously monitors the predicted
range at the Closest Point of Approach (CPA)
and predicted time to CPA (TCPA) of each
tracked target to own ship.
When the predicted CPA of any target be-
comes smaller than a preset CPA alarm range
and its predicted TCPA less than a preset
TCPA alarm limit, the ATA releases an au-
dible alarm. In addition, the target plot sym-
bol changes to a triangle and flashes together
with its vector.
Provided that this feature is used correctly, it
will help prevent the risk of collision by alert-
ing you to threatening targets. It is important
that GAIN, A/C SEA, A/C RAIN and other
radar controls are properly adjusted and the
ATA is set up so that it can track targets ef-
fectively.
CPA/TCPA alarm ranges must be set up prop-
erly taking into consideration the size, ton-
nage, speed, turning performance and other
characteristics of own ship.
The CPA/TCPA alarm feature should never
be relied upon as a sole means for detecting
the risk of collision. The navigator is not re-
lieved of the responsibility to keep visual look-
out for avoiding collisions, whether or not the
radar or other plotting aid is in use.
Follow the steps shown below to set the CPA/
TCPA alarm ranges:
1. Press [MENU], [7], [7] to display PLOT
MENU 1.
2. Press [5] (CPA SET) to select CPA limit
desired from the CPA SET line.
3. Press the [ENTER/SELECT] key.
4. Press [6] (TCPA SET) to select a TCPA
limit desired.