Quote:
Originally Posted by lexington
With huge numbers of missiles it makes sense to do it by percentages rather than dice rolls.
Each missile has effective skill 16.
Point defense has effective skill 12.
There are 100 missiles.
Totals hits = 100*.98*.26 =
If you still want to be rolling dice make it a Quick Contest and vary that number based on the results.
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Point defense can't be modeled reasonably as just an effective skill level. Even in theory, probably, because you need more resolution than 3d6 provides to support some levels of defense you'd want! Also, determining the 'effective skill' is decidedly non-trivial, because it depends on the numbers of weapons and missiles involved in addition to the usual factors that modify attack rolls.
And since getting hit by 25 GURPS Spaceships missiles will typically reduce a ship to confetti, in any 'survivable' engagement for the as-written weapons you're likely to wind up in the pinch of needing to dice out whether an expected 0.1 hits actually means getting hit on this volley or not getting hit.