B&G Hydra 2000, Руководство пользователя

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Hydra 2000 User Manual
Part 2 - Operating Information
HB-0844-02
2- 37
This is the resettable log for recording trip distance and reads
from the moment it is started, in nautical miles. It must be
remembered that this is the distance sailed through the water, not
over the ground. It also forms part of the calculation for Average
Speed. A useful feature is that if it is reset prior to the start of a
race, then when the Timer counts down to zero, the trip log (and
any other trip functions that have been reset) start automatically.
The trip log display can be expanded to display a maximum of
9999 nautical miles by pressing the
Enter Key.
2.11.37 True Wind Angle
Menu Heading: WIND
Function Text: TRUE W/A
Update Rate: Once per second
Units: Degrees
Notes
1. Relative to the boat’s heading.
2. Corrected for masthead and other errors via the Look-up Table
(see Part 3 - Calibration).
3. Variable damping 0-99 seconds.
The true wind is calculated from the vector triangle shown in Fig.
2.4. This uses the apparent wind speed, apparent wind angle and
the Boat Speed in the calculation. The results are then corrected
by the true wind correction tables, which are detailed in
Part 3 -
Calibration.
Note
The true wind is the wind relative to the water, and is not the same
as the ground wind, unless there is zero tide or current. The true
wind angle is the angle between the boat's heading and the true
wind.