Vehicle Modz, AI Targeting VS G.A.

[lordnth]

OK I have a few questions with these two Modz.

Advanced AI Targeting Acquisition
AI Targeting with longer than standard range. One single main weapon system has a 3 inch boost to effective targeting range.
Effect:+1 to ranged attack with main weapon system
Cost: 3 points

and

Gravatonic Accelerator
The GA is an advanced technical sub-atomic accelerator generating a massive boost in energy to primary weapon systems. It extends the range of the vehicles primary weapon system.
Effect:+3 inches to single main waepon system range.
Cost: 3 points

They both do the same thing (but the second one does it better) but they have the same cost. Is this an error?
Also can the two be purchased together?
What about "Can purchased more than once?" Buy either for each weapon to get more range on all your weapon systems?

[lordnth]

Sorry I should have posted this in the rules question section. Is there a chance a MOD or Admin can move this thread there? Or just let me know and I'll re-post it.

[comstar]

I think they are effectively the same as in description Ad Ai says it extends 3" but then says 1" but Grav Ac only says it in effect not description. Hopefully Robin can clarify as I've always used Grav Ac

[inrepose]

That is an error. AI - should only give +1 to ranged attack rolls. GA is the boost in actual range of the primary weapon system but it does not increase the attack roll.

So :

AI: Boost to skill roll of +1 when making a ranged attack.
GA: Boost of +3 inches to the base range of the primary weapon system.

[comstar]

Thanks Robin