6.1 General
The Auto Plotter
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.
NOTICE
Heading data required for plotting function.
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
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.
