Raymarine Radar Scanner User Manual download pdf (Page 13)

Chapter 1: Overview 5

1.3 Selecting the scanner unit site

This section provides information that affects the possible locations

of the scanner, and its position relative to the display unit and to the

power supply.

The dimensions of the each scanner unit are shown in the following

diagrams.

Selecting the best location for the scanner unit requires careful

consideration of the following points, to ensure reliable and trouble

free operation:

Note: In order to minimize potential interference to other systems on

board ship (EMC), it is advisable to mount the scanner on a part of

the boat that is insulated from the ship’s battery negative. If you can-

not do this, and encounter problems, you can fit insulating bushes be-

tween the scanner and its mounting bracket.

• Height: The scanner unit should normally be mounted as high as

practical above the waterline, for three reasons:

• For safety reasons the scanner should be out of range of per-

sonnel, preferably above head height. This avoids mechanical

danger and electromagnetic contact, particularly with the

eyes.

• Radar operates at the line-of-sight, so a high mounting posi-

tion gives better long range performance.

• Surrounding large objects, in the same horizontal plane, can

interfere with the radar signal and cause blind areas or shadow

sectors and false targets on the radar screen (see below).

However, do not mount the scanner so high that it is affected by

the pitching and rolling of the vessel. In addition, you may need to

lower the scanner to avoid creating a shadow sector underneath

the scanner’s beam.

Extension cable 5m

Extension cable 10m

M92699

M92700

5S, 7S, 9S, 11S

(24/32V only)

5S, 7S, 9S, 11S

Software Upgrade Kit Please contact your authorized dealer or

distributor for details

Table 1-2: Open array scanners

Item Part No. Supplied with: Option for:

154_4.book Page 5 Wednesday, October 25, 2000 3:02 PM

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Raymarine Radar Scanner User Manual Page 13