A couple of the NCO Command Squad skills seem a bit problematic for underground combat.
Smoke Mortars represent "a special Artillery Strike that uses smoke shells instead of explosives" (Operation Cerebus, pg. 10).
Ammo Dump represents "an airdrop of ammo to a friendly unit" (Operation Cerebus, pg. 11).
Based on the fluff, it seems like neither of these skills should be usable underground. However, I don't see anything in the rules which would prevent their use.
How would you folks handle their use in underground scenarios?