Re: Commander Deployables
I thought the domes were the sheild generators for the bridge.
Thats what I saw in the movie
This is a common missconception.
In the film, you see two A-wing's take out one of the sensor domes, you then see one of the bridge officers report that the bridge deflector shields are down and Piett order's concentration of forward fire power and "too late"! etc etc... well the reason the dome was destroyed was a result of shield failure, not the shields are down because of the domes destruction. The shields had weakend to that point because of Admiral Ackbar's order to concentrate all his fleets firepower on the Executor.
Blueprint's of the Star Destroyer back from the 70's also substantiate this fact.
The domes are also modeled after real life radar domes.
SWTC goes into much further detail. You can read more here: http://www.theforce.net/swtc/towers.html#globes