1. OPERATION

User menu description

 

 

Item

Description

TX/ST-BY

Sets radar in transmit or

 

stand-by status. (Same

 

functions as the [MODE] key.)

INT

Rejects radar interference.

REJECTION

 

ECHO

Stretches echoes in range

STRETCH

direction or range and bearing

 

direction.

FTC

Suppresses long-range rain

 

clutter.

NOISE

Rejects noise.

REJECTION

 

WATCHMAN

Periodically checks for targets

TIME

in guard zone.

HDG LINE

Temporarily turns the heading

OFF

line off.

ECHO TRAIL

Shows echo movement in

 

afterglow.

TRAIL

Adjusts echo trail brilliance.

BRILLIANCE

 

SYSTEM

Opens the system menu. For

MENU

description see paragraph

 

1.30.

1.15 Heading Line

The heading line indicates the ship’s heading and it is the solid line which appears at zero degrees on the bearing scale.

To temporarily erase the heading line to look at targets existing dead ahead of own ship, do the following:

1.Press the [MENU/ESC] key to open the User menu.

2.Press ▲ or ▼ to choose HDG LINE OFF from page 2.

3.Press ► to turn the heading line off. The line stays off while ► is pressed.

4.Press the [MENU/ESC] key to close the menu.

1.16 Interference Rejector

Mutual radar interference may occur in the vicinity of another shipborne radar operating in the same frequency band (9 GHz). It is seen on the screen as a number of bright spikes either in irregular patterns or in the form of usually curved spoke-like dotted lines extending from the center to the edge of the picture. This type of interference can be reduced by activating the interference rejector circuit. “IR” and the rejection level indicator “L,” “M” or “H” appear at the top right corner when the interference rejector circuit is on.

Appearance of interference

Turn off the interference rejector when no interference exists, to avoid missing small targets.

1.Press the [MENU/ESC] key to open the User menu.

2.Press ▲ or ▼ to choose INT REJECTION from page 1.

3.Press ► to open the options window.

4.Press ▲ or ▼ to choose OFF, LOW, MEDIUM or HIGH as appropriate.

5.Press the [MENU/ESC] key to finish.

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Furuno 1715 manual Heading Line, Interference Rejector, User menu description, Appearance of interference, Description