B&G Deckman - Manual (Page 180)

User variables
12.21
Here you can see that, as well as interpolating within the calibration
points you enter, Deckman will also extrapolate outside them.
Calibration example 3
It is also possible to multiply, subtract and divide in your corrections.
For example, a table to alter boatspeed with respect to angle of heel
might look like:
4 0 0 1 1
table 0 *
-40
0.95
-30 0.95
-25 0.975
-20 0.99
-15 1.0
15 1.0
20 0.99
25 0.975
30 0.95
40 0.95
This table is, therefore, taking the standard input from boatspeed (which
would be specified in the j_varsXX.d file) and applying a correction
based on angle of heel (Deckman identification number 0 after table).
So far, this is operating the same as the example above. Next, however,
we have a multiplication sign (*), which indicates that boat speed is to
be multiplied by the values in the table. Then the table works as before
for calibrating with respect to another variable: the left column indicates
the value at which the calibrations to be applied while the right column
is the multiplication factor. The example above would act to reduce
boatspeed with increasing angle of heel.
Other identifiers and operators
As well as the word table Deckman also recognises two other
identifiers:
Variable The next number refers to the Deckman number,
and a mathematical symbol indicates what
operation is to be performed.