Furuno far-2805 series Manual De Usuario
2-12
Displaying and erasing past
positions
positions
To display past positions, press the
HISTORY key to display past positions of
targets being tracked. The label HISTORY
appears at the upper-right corner of the
screen.
HISTORY key to display past positions of
targets being tracked. The label HISTORY
appears at the upper-right corner of the
screen.
ORIGIN
MARK
VECTOR
TRUE/
REL
VECTOR
TIME
TARGET
DATA
TARGET
BASED
DATA
AUTO
PLOT
TRIAL
LOST
TARGET
HISTORY
To erase past positions, press the HIS-
TORY key again.
TORY key again.
Selecting the number of dots and
past position plot intervals
past position plot intervals
1. Press the E, AUTO PLOT MENU key
on the plotting keyboard to show the
ARPA 1 menu.
ARPA 1 menu.
Hit [E, AUTO PLOT MENU].
1 AUTO ACQ
2 AUTO ACQ AREA
3 GUARD RING
4 GUARD RING SET
5
6 CPA, TCPA SET
2 AUTO ACQ AREA
3 GUARD RING
4 GUARD RING SET
5
6 CPA, TCPA SET
7 HISTORY POINTS
8 HISTORY INTERVAL
0 [ARPA 2]
8 HISTORY INTERVAL
0 [ARPA 2]
OFF/ON
6 NM/SET
OFF/ON
6 NM/SET
OFF/ON
CPA 00.0NM
TCPA 00.0MIN
5/10/20*
30S/1/3/3/6MIN
TCPA 00.0MIN
5/10/20*
30S/1/3/3/6MIN
*5/10 only on IMO-type
[ARPA1]
2. Press the [7] key to select menu item
7HIST ORY POINTS.
3. Further press the [7] key to select a de-
sired number of past positions (5, 10,
20, 30, 100, 150 or 200). The IMO-type
has the selection of only 5 or 10.
20, 30, 100, 150 or 200). The IMO-type
has the selection of only 5 or 10.
4. Press the ENTER key to confirm your
selection.
5. Press the [8] key to select menu item
8HIST ORY INTERVAL.
6. Further press the [8] key to select a de-
sired past position plot interval (30 sec-
onds, 1, 2, 3 or 6 minutes).
onds, 1, 2, 3 or 6 minutes).
7. Press the ENTER key to conclude your
selection.
8. Press the E, AUTO PLOT MENU key
to close the menu.
2.12 Setting CPA/TCPA Alarm
Ranges
The ARPA continuously monitors the pre-
dicted range at the Closest Point of Ap-
proach (CPA) and predicted time to CPA
(TCPA) of each tracked target to own ship.
dicted range at the Closest Point of Ap-
proach (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 ARPA re-
leases an aural alarm and displays the
warning label COLLISION on the screen.
In addition, the ARPA symbol changes to
a triangle and flashes together with its vec-
tor.
comes smaller than a preset CPA alarm
range and its predicted TCPA less than a
preset TCPA alarm limit, the ARPA re-
leases an aural alarm and displays the
warning label COLLISION on the screen.
In addition, the ARPA symbol changes to
a triangle and flashes together with its vec-
tor.
Provided that this feature is used correctly,
it will help prevent the risk of collision by
alerting you to threatening targets. It is
important that GAIN, A/C SEA, A/C RAIN
and other radar controls are properly ad-
justed.
it will help prevent the risk of collision by
alerting you to threatening targets. It is
important that GAIN, A/C SEA, A/C RAIN
and other radar controls are properly ad-
justed.
CPA/TCPA alarm ranges must be set up
properly taking into consideration the size,
tonnage, speed, turning performance and
other characteristics of own ship.
properly taking into consideration the size,
tonnage, speed, turning performance and
other characteristics of own ship.
CAUTION
CPA/TCPA Alarm
The CPA/TCPA alarm feature should never
be relied upon as the sole means for detect-
ing the risk of collision.
The navigator is not relieved of the respon-
sibility to keep visual lookout for avoiding
collisions, whether or not the radar or other
plotting aid is in use.
be relied upon as the sole means for detect-
ing the risk of collision.
The navigator is not relieved of the respon-
sibility to keep visual lookout for avoiding
collisions, whether or not the radar or other
plotting aid is in use.