Quote Originally Posted by Death13a
Union couldn't attack Gundam because the only way is to get visual on Gundams (NO radar, heat(no exhaust) or sound(no engines) and maybe infared going to work to detect them).
Well, visual alone would be plenty and enough. Even today you could build a homing system relying on the visible area of electromagnetism. And radar would work just fine from such a short distance. And it's not like the Gundams even look particularly radar deflective, but I suppose they could be from longer distances, but there should be no troubles from shorter distances. The fact they are perfectly visible tells they don't have any uber electromagnetic dispersion capabilities.

Quote Originally Posted by PSJ
They didn't move an inch when the gundams appeared and that seems weird to me. At least take some kind of Defensive position if they noticed the gundams early like you said they should have done.
There aren't anything a ship could do when a high speed aerial vehicle suddenly flies over, aside from using AA fire and countermeasures. Ships are slow things. They can't be moved fast enough into any defensive positions (and what would those even be, anyway?). A ship of that size is practically a stationary target for a Gundam.

Well, other than that, the ships should theoretically be quite resistent. The shield the Gundams use can take plenty of hits, yet they are light enough to be carried by a flying vehicle. So, it's more than reasonable to assume the ships are extemely tough because they don't need to fly. A ship is a thing that can economically carry huge loads. So, the Gundam would have been hard pressed to sink even one ship before all the others would have opened fire and taken the Gundam out of the sky. So, I deem it wasn't a bad gamble for the Americans.