Artillerists must operate all missile engines in order to allow them a chance to hit. (You may, at your option, allow fighters to opt to learn various artillery engines in lieu of normal hand weapons.) The level of the crew chief determines the chance "to hit", i.e., if a 0 level fighter, then the first column, if a 1st or 2nd level then the second level, etc. All targets, regardless of actual armor class, are considered as AC 0 [Ed. note: that's AC 20 in 3rd Ed.] for purposes of "to hit" determination, except ballista targets which are always considered to be AC 10 if exposed to sight. If a direct hit is scored, determine damage according to target size.
