Do the marksman and/or sharpshooter SPAs work in conjunction with indirect fire, or are the benefits of the SPAs only applicable to direct fire attacks?
The rules (p.56 of Alpha Strike Companion for sharpshooter, or p.5 of Alpha Strike Companion Errata v1.1 for marksman) do not state it must be a direct fire attack. The descriptive text for sharpshooter states "accomplished gunner who can strike at his enemy’s weakest points with deadly accuracy", and "skilled at placing his shots for maximum effect" for marksman". The descriptive text made me wonder if a direct fire attack was implied?
(While writing this question I also noticed that sharpshooter could probably use some errata, it states "and delivers attack that succeeds by a margin". The marksman errata states "successful weapon attack" so I would assume this should apply to the sharpshooter also.)