B&G Deckman - Manual (Page 73)

Chapter 4: Start display
4.8
values by hitting S for TWS or D for TWD. To stop holding the wind
and revert back to the incoming data, simply hit menu>toggle start
wind (or hit menu>hold wind and uncheck the Hold on box).
Wind calibration
During the start, it is likely that you will have different sails up to what
you would have usually. In addition, the way you have the boat setup,
for example runner tension, may be different. Consequently, the
required wind calibrations will be different. When the start display is in
use, Deckman therefore uses separate wind calibration tables.
With the Start display open, select menu followed by either start adjust
wind angle or start adjust wind speed to access the relevant tables.
The operation of these is then exactly the same as the normal calibration
tables (see page 8.1).
Note. Because Deckman uses different calibration tables in the start, if
you make changes to the normal calibration tables, these will not be
reflected in the appropriate start tables.
Advanced options
Often during the start the boat will not be facing in the direction of the
start line and also may not be sailing at full speed. Deckman therefore
allows you to predict your rate of turn and acceleration times, and then
factors these in to predictions about time to the line.
Two additional files must be added to the data directory (see the
Deckman files chapter): rateofturn.d specifies the rate of turn and
timetospeed.d is the acceleration. A sample and explanation of each is
below.
Rate of turn
In the rateofturn.d file you predict your rate of turn in degrees per
second for different boat speeds. Obviously these will never be exactly
the same, but some sensible estimate here is likely to make Deckman
predictions in the Start display more accurate.