[Taqwus]

1. Seekers always hit, unless
a) shot down (point defense), or
b) runs out of fuel before impact.

Direct-fire weapons all use the same accuracy penalties over range, IIRC...

2. Perhaps the higher-level GCs are better?
Some trees are like that.

3. Sources of +/- hit modifiers include:
a) intrinsic to weapon (e.g. PDC)
b) ship experience (1 for 1, IIRC)
c) distance (-10% per square or so)
d) facilities in system (e.g. Event Predictor III gives a +30% combat bonus)
e) combat sensors (up to +60%)
f) target's ECM (up to -60%)
g) weapon mount (base mounts give bonuses, IIRC)

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-- The thing that goes bump in the night