B&G H2000 Pilot *DISCONTINUED* - Manual (Page 100)

h2000 User Manual
100 HB-0845-06
Wind Angle True Wind Speed
5 10 15 20 25 30
Upwind 2 5 3 2 1 1
Reaching 3 5 6 5 4 3
Downwind 0 0 0 0 0 0
Table 4. - Example of True Wind Angle Correction Table
The table initially contained in the h2000’s memory is
empty and we need to discover and enter the relevant
corrections for true wind direction. To see how we work out
the correction we will look at an on the water situation, from
which we can determine some general rules.
10˚
Heading
=160˚
40˚
Heading
=250˚
40˚
Starboard Tack
true wind direction
200˚
Port Tack
true wind direction
210˚
Figure 12 - True Wind Direction Error
In Fig 12 we see a typical situation, sailing on port tack,
upwind, in ten knots, the true wind direction reads 210. We
tack over onto starboard and settle the boat down, now the
true wind direction reads 200. There is a ten degree error
tack to tack. The true wind direction should read 205 on
both tacks. To correct the true wind angle so that the true
wind direction reads 205 on both tacks, we need to add 5
degrees to the true wind angle. So for a general rule we can
say:
If you are lifted from Tack to Tack subtract half the
difference.