DSII: Open topped vehicles

That's how we've been playing it (ground attack fighters as well) also mines
attack the lesser armor value

> I was doing a bit of reading and came across a rather interesting

> Pinky: Uh..I think so Brain but, uh..Brain? where did all those

I was doing a bit of reading and came across a rather interesting point.
 In
the book it says that open topped vehicles are treated as Armour class 0 for
artillery and SLAMs. does this then mean that they have a top armour of 0 (i
would assume so), and so does that mean that any vehicle must use an armour
value for their top when attacked by arty or SLAMs? (ie 1 less than their
front armour value)