[Aiken]

Loser is right about infinite distance missile.
Example from the SJ's Gritty Economy mod which has infinite range missiles:
Weapon Type := Seeking
Weapon Target := Ships
Weapon Damage At Rng := 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100

So, as you see, they have to fire at range 21.