Rubble

[berto]

This is from the rule book:

" The probability that the rubble will be cleared in the hex is half the Digging-In Parameter Data value per turn." The pdt files show a value of 3. What I don't know is how that value is then translated. Perhaps it translates into an engineering unit having  a 1.5% chance each turn to remove rubble. Someone of more knowledge can address that if needed.

1.5% chance, that is correct.

and that percentage never changes???

Yes, apparently so.