Simrad NX40 Installation Manual download pdf (Page 15)

Install the radar | 13

3.3 Power boat installations

Normally, you should install the scanner horizontally, to produce an equal sweep around the

boat:

However, when a power boat is traveling at high speed, the bow rises up out of the water and if

the elevation angle (trim) of the bow is raised up so that it equals, or exceeds, 50% of the

vertical beam width of the radar, this can cause two problems:

• Ahead of the power boat, the beam is projected too high to sweep the water surface

effectively. Targets can be missed completely or appear at a very poor resolution on the

display screen.

• Astern of the power boat, the beam is projected too low and is concentrated over a small

area of water so that sea clutter becomes a problem on the display screen.

In this case, you're recommended to install the scanner so that it is tilted down at the front, at

an angle that will produce an almost horizontal sweep when the power boat is running at speed.

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Simrad NX40 Installation Manual Page 15