Why can't my FO order his mortars to fire

[Artofwar]

Thanks Andy I started rereading what I had read the other day sure enough on page 344 it reads what you just said "Although any “0” formation HQ unit
with a radio can perform spotting with the exception of on map artillery units" I read this the other day .....duh ... I'm fighting this battle in April 1940 they probably don't have radios they probably don't even have bullets. How do I figure out if they have radios AND if it is 'a proper indirect fire capable mortar element' I guess I figure this out in the UNIT Info screen or encyclopedia or both perhaps I can right click on unit while on the map too. ???

OH Hey IMP ok yeah that makes sense too nothing like putting the tube perpendicular to where your at firing straight up in air so it lands in your own position.. bad day for everybody ..

Ok there it is under the info screen .. It's a 5cm LeGrw 36 Radio = 0 Vision = 0 Fire Control = 0 ... uh Good thing they gave them a smg and 60 rounds ammo !!!

Thanks for guiding me never would have figured it out..