Hi all,
I have been playing PG for about 8 years now (3rd and 4th edition) and came across a question on Opportunity fire that i never thought of (or noticed for that matter) after looking at the chart. Namely, if you look at the 4th edition charts, the +1 for opportunity fire on the DF chart indicates
+1 Opportunity Fire (13.0) vs. personnel unit. Looking at the definitions section in the rules (1.2), there are examples of Personnel units and it states Anti-Tank Rifle units but not AT guns, etc.
The situation we came across was that a German 37mm AT gun on a wagon with a LT was moving and fired on by INF units. At the time, we couldn't determine the rule so we allowed the +1 for the opportunity fire (as well as the +1 for the target is an AT gun, etc) - didn't change the overall result but looking at it now, I don't think we should have applied that +1.
Thinking back, we may have applied this modifier in a few games that may have changed a result...