User blog comment:Braveangel/About planetary defenses/@comment-2006054-20100429144337

There is also a VAT that replaces keepers as they wear out or get damaged (or otherwise disabled).

Yes, it is Cylon ... my bad. :D Well, I guess I saw a space platform (orbital space port?) full of batteries orbiting Caprica at the time of the Cylon's attack with a full complement of battleships surrounding it. I guess I have to admit that Spart is right on this: the Council is too complacent to acknowledge that their formidable fleet crumbles in the face of a concerted attack. And that the plot demands that the Council be complacent to allow Shepard's role as the savior of the galaxy. If the Council is open minded, there would be no Saren in the first place.

Then again, it took a suspension of disbelieve on my part that the Destiny Ascension was easily crippled by the onslaught of the geth's cruisers. That ship was the pride of Citadel's fleet. It's true, she could still hold her own against the pressing assault, but unless Shepard chooses to save her, she's lost.