Furuno FR-7112, FR-7252, FR-7062 General, Keys Used for Auto Plotter, Principal specifications

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.

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 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.

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