Aircraft Targeting Issue

[Shad]

Man this is a lot like the 2nd Amendment: how you group the words changes the meaning entirely.

However, they are prohibited from attacking unspotted enemy pieces located in limiting terrain and all hidden units

To me this is the grouping:

• unspotted enemy pieces located in limiting terrain
  
• all hidden units
  

Therefore a piece (unit) in any clear hex on the map layout is fair game, spotted or otherwise. Units occupying limiting terrain must be spotted. Hidden units that you can see due to cardboard necessity are off-limits entirely.

My take