On a related note, what is the minimum credible point defense 
system?

* 3e TL13, plenty of superscience including contragrav, beam 
  weapons, reactionless thrusters, etc.
* Robotics but no good AI -- I want fragile organic beings in
  the middle of the action.
* Battlesuits might be DR 500 to 1,000, and it would be neat 
  to have anti-personnel capability (if possible).

Missiles built with the VE rules are relatively easy to kill
if you can hit them (VE197, 10 points of damage). Robots and 
Vehicles drone missiles will be somewhat tougher. Given that
difference, an anti-suit capability looks iffy.

At a first glance, x-ray lasers with the laser autofire rule
are a good idea, even if they're three TLs out of date. 

Fusion or antiparticle beams have a nice area effect, but by 
the rules that is based on the point which is hit -- no good
for aerial targets.

The turn sequence for any engagement is a problem:

* Turn one is the launch of the weapon. Say you can make the
  sensor roll on the same turn. 
* Firing on the next turn requires an impossible snapshot, 
  or the use/abuse of the walking the burst rule. The first
  burst of the weapon is lost, the second burst gets aiming
  benefits.

Technically, a missile which arrives on the same turn can't
be intercepted. Let's ignore this little problem :-)

Detecting VE missiles is relatively easy because they can 
have stealth, but no IR cloaking. A SM-3 missile, one mile
out at 1,000 yps, together -18. A skill 15 computer with a
scan 20 sensor is almost certain to make contact. 

A drone with emission cloaking would be a lot harder. 
Instead of a 30-mile sensor, you'd need 30,000 miles. OTOH, 
a small drone using the VE rules won't be quite as fast as 
a missile using the missile design rules.

Optical detection will be difficult, too, with intruder 
chameleon there would be a -24 target vs. a vision roll of
IQ + 10 + bonus. The vision bonus table tops out at +9 ...

Any mistakes in my numbers?

Regards,
Onno
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