Simrad SH90 - PRODUCT DESCRIPTION REV A Specifications download pdf (Page 20)

IS15 General Manual

18 20220760L

True Wind Speed Alarm limit

Refer to Figure 2-2, page 12 to set the wind speed alarm limit (0-

99 knots).

Screen 3

WIND DIRECTION

The screen displays the Wind Direction in degrees and the unit

(‘T’rue or ‘M’agnetic). Refer to page 20.

Screen 3 has a sub screen for setting the magnetic variation.

Refer to page 21.

Notes !

1. The Wind Direction is calculated from available heading

data. The wind direction given is the effective wind direction

over the water. The display will be most accurate after a

period on one heading, however, it will respond rapidly to

course changes.

2. If there is no heading data, but Course Over Ground (COG)

data is available then the Wind Direction is calculated from

the Course Over Ground. In this case there is compensation

for the tide, and the wind direction given is the effective wind

direction over the ground. However the display will not be

accurate after a course change, and will require a period on

one heading before it is correct. (Any errors in the

Navigation Receiver’s fix will degrade the accuracy of the

wind direction.)

3. The Wind Direction is referenced to either Magnetic or True

North as selected for the heading. The data can be converted

from one to the other if the local magnetic variation is

available (page 20).

4. Note that the ‘TRUE’ and ‘APPARENT’ readings that are

shown in this group of screens relate to the Wind Speed and

Angle, and not the Wind Direction.

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Simrad SH90 - PRODUCT DESCRIPTION REV A Specifications Page 20