B&G Deckman - Manual (Page 43)

Chapter 3: Navigation
3.16
Figure 3.8
information on these) or a wind table in which you must predict wind—
direction and strength at particular times, as shown in Figure 3.8.
Similarly, in Which Current? choose what source of current data you
wish to use: Deckman's own tidal database, current GRIBs or your own
predictions. An additional option will appear if the Local Knowledge
server is enabled.
When entering information in the wind or current tables, the following
applies: times of predictions should be entered in hours and minutes. If a
prediction is 24 hours or more after the previous one, the time must be
preceded by a number equal to the number of complete 24 hour periods
that have passed since the last entry. Clicking on a value allows you to
change it; clicking in the left hand column followed by insert allows you
to add new entries. Note that if these tables contain only one entry then
the values will be used at all times; if two or more entries exist,
Deckman will interpolate between the values, and the times must cover
the whole range of time for which you are planning.