C.A.R.D. 060 Manuel d'installation télécharger pdf (Page 10)

Page# 10

The control panel has a dial that when turned clockwise will

activate the system and sets the level of sensitivity.The toggle

switch will select the level of audio desired.

Since radar transmissions travel line-of-sight, the distance at

which a target is detected is dependent primarily on two factors :

the height of the transmitting antenna and the height of your

receiving antenna...Thus, if the C.A.R.D. antenna is mounted on

your stern rail and has an unobstructed view of 5 to 15 miles you

should receive an indication if there are any radar emitting ships

in the area.

Another factor affecting range is the power of the other ship’s

transmitting radar. Do not assume that a weak signal is distant

and a strong signal is close. A very powerful radar several miles

away can be of equivalent signal straight as a small radar on a low

range setting. Keeping in mind the fact that a C.A.R.D. does not

finitely measure range, overall range reception is adjustable by

changing the sensitivity control knob.

Although, as this discussion indicates, a specific maximum range

cannot be determined without knowing all the factors, experience

has shown that approximate ranges of 35 miles are attainable.

You should also bear in mind the visual distance to your horizon

is also a function of your height of eye. Therefore it will serve a

little useful purpose to detect a ship at 30 miles if it never closes

to within your visual sighting range, let alone becomes a collision

threat .

It is also important to note that a powerful transmitting Radar

Unit fairly close aboard will saturate the system, however, by

rotating the sensitivity knob clockwise, a more accurate direction

can be determined.

Further, if you are transiting near a steep coastline and are

illuminated by a ship outboard of you, you may get an indica

tor

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C.A.R.D. 060 Manuel d'installation Page 10