Combat in SEV

[Kana]

I was wondering how range is calculated, and the size of the combat area in SEV? I was going over some material for my SFB mod, and was wondering if SEV uses some arbitrary LOS measurement (KM?, AU?) or if its still based on squares or hexes. Also the size of the combat area would affect the maximum range that we could apply to weapons, and the effects of movement of the ships. Especially if the retreat option is included.

Kana