Raymarine Ray 106 User's Guide download pdf (Page 84)

74 RayTech RNS V6.2 - User’s Guide

have turned the radar on to allow the magnetron to warm up. The

optimum setting varies slightly for different display ranges, depending on

the pulse width used.

Note:

It is recommended that you leave the tune function in AUTO mode, to

ensure that the radar receiver is always tuned to receive the maximum signal.

10.6 Making targets clearer

You can improve a target’s visibility using the

Target Tracking function controls.

The functions are:

•Int Rej.

• Expansion.

•Wakes.

•Clear Wakes.

To use the targets controls:

1. Click on the soft key for the required function.

2. Click on the soft key for control options.

3. Adjust the settings as necessary.

4. When you have finished, click the

BACK

button.

Interference rejection

The interference rejection (Int rej) function reduces the interference caused

by radar equipped boats operating within range of each other.

Expansion

The target expansion function makes targets easier to see by expanding

them. The radar scanner type determines the range at which target expan-

sion is available. Target expansion overrides the normal pulse length,

thereby increasing the size of the target seen on the screen; however, this

is at the expense of range resolution.

Wakes

The wakes function enables you to see the direction and speed with which

targets are moving relative to your boat.

With wakes switched on, a target is displayed at the brightest level, while

its previous positions are retained at successively fainter levels on the

screen. You can select long, medium or short wakes, which retain informa-

tion from previous scans at a reduced video level.

10.7 Setting up the radar display

Range control enables the radar picture to be viewed at varying scales. This

is also known as ‘zooming’ in or out. The shortest range scale gives a

maximum range of 1/8 nm, measured from the center to the top of the

radar picture. The longest range scale gives a maximum range of between

24 and 72 nm, depending upon your scanner type.

Short range scales

The short range scales provide greater detail of the radar echoes close to

your boat, and should be used as you approach coastlines, harbors or other

boats in the area.

Long range scales

The long range scales provide the best overview of your boat’s relationship

to landmasses, weather fronts, and large ship targets, in or beyond view.

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