15. Navigation Sensors
15-15
15.8 Wind Sensor
chart radar can display and output wind data in the following three formats:
Apparent: Windmeter-measured wind speed and direction.
Wind angle reference: Heading
North: True wind angle, true wind speed
Wind angle reference: True North
Theoretical: True wind angle, true wind speed
Wind angle reference: Heading
The illustration below shows wind speed and direction with given ship data.
The wind values are as shown below.
Ship information:
COG: 60° SOG: 8.7 kn
Heading: 45°
Wind angle Wind speed
Apparent: 345° 10 kn
North: 330° 5 kn
Theoretical: 285° 5 kn
Wind speed
(apparent: 10 kn)
Apparent Wind
Heading
Angle (reference North)
Wind Angle
(North: 330
°
)
Wind Angle
(Theoretical: 285
°
)
Wind Speed
(North/Theoretical: 5.0 kn)
Ship's Speed
(SOG: 8.7 kn)
True Wind
North
Wind from NNW (330
°
)
Wind Angle
(Apparent: 345
°
)
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