Furuno FR-7112 - Manual (Page 36)

6-2
6.1 General
The Auto Plotter ARP-10 is an optional circuit
board which is accommodated in the display
unit of the FR-7062 radar.
The Auto Plotter permits manual or automatic
acquisition and automatic tracking of up to 10
radar targets. An internal microprocessor cal-
culate target data such as speed and course and
displays the results in alphanumeric and by vec-
tors. To ensure the reliability of the displayed
target data, the radar must be properly adjusted
for minimum sea returns and noise.
Principal specifications
Acquisition and tracking
•
Acquisition of up to 10 targets between 0.2
and 16 nm.
•
Automatic tracking of up to 10 acquired tar-
gets between 0.1 and 16 nm.
Vectors
Vector length: 30 s, 1, 3, 6, 15, 30 min.
Orientation: True velocity or relative velocity
Past positions
5 past positions at intervals of 15, 30 s, 1, 2, 3,
6 min.
Alarm
Visual and audible alarms against targets vio-
lating CPA/TCPA limits; visual alarm against
lost targets.
Target discrimination
A target measuring about 800 m or more in the
radial or circumferential direction is regarded
as a landmass and not acquired or tracked. Ech-
oes smaller than about 800 m are regarded as
true targets.
Heading data required for plotting
function.
NOTICE
6.2 Keys Used for Auto Plotter
The Auto plotter utilizes the following touchpad
keys. Given below is a brief description of these
keys.
MENU:
Displays/Erases the main menu.
SELECT/CANCEL:
(Long press) Terminates plotting of the target
selected with the cursor.
(Short press) Displays the data of target selected
with the cursor.
ACQ/ENTER:
Acquires the target selected with the cursor.
ARP-10 MENU operation
The ARP-10 MENU includes the followings:
Display:
Turns on/off the plot symbols, past positions
and target data.
All Cancel:
Cancels the tracking of all targets.
Vector Ref:
Selects relative vector or true vectors.
Vector Length:
Selects vector time.
History:
Selects past position plot interval.
CPA Set:
Selects CPA alarm limit. When a target is pre-
dicted to come within this limit, an aural alarm
sounds and at the same time the corresponding
target symbol changes to a blinking triangle.
Note: If the preset CPA limit is set at OFF, a
target which is on collision course will not pro-
duce an alarm.
TCPA Set:
Selects TCPA alarm limit.
Auto ACQ:
Turns on/off Auto Acquisition Area.