Rules Question

[Schwerpunkt75]

Gentlemen,

1) What is the rule re: unobserved indirect fire? How is the attack strength for unobserved fire missions changed compared to observed fire?

2) If an indirect fire mission is plotted on an unobserved hex, but drifts onto a hex that is observed, will the attack strength be as for an observed fire mission, or an unobserved fire mission?

3) I suspect I already know the answer to this question, but does the direct fire target density rule apply to indirect fire missions?

Schwerpunkt75