B&G H2000 Pilot *DISCONTINUED* - Manual (Page 92)

HB-0844-04
3-27
Fig 3.6 - True Wind Direction Error
Fig 3.6 is a typical situation, sailing on a port tack, upwind, in a ten knot wind,
the true wind direction reads 210°. The vessel then tacks to starboard and is
maintained on a steady course. The true wind direction now reads 200°.
There is a 10° 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, 5°
should be added to the true wind angle. As a general rule it can be said:
If the wind direction is higher on port tack than starboard tack, ADD
HALF the DIFFERENCE in readings between the two tacks to the true
wind angle.
The converse will apply:
If the wind direction is lower on port tack than on starboard,
SUBTRACT HALF the DIFFERENCE in the readings between the two
tacks, to the true wind angle.
This method is used when tacking upwind, gybing downwind or tacking reach
to reach.
The correction value at each point in the table is entered into the Hydra 2000
memory. The true wind correction facility, is then found in the menu by:
WIND
→ → TRUE W/A, CALBRATE → → CORRECTION