brash_stryker said:
Yes. My interpretation was always that the scanners only extended beyond the surface of the ship, therefore by attaching itself like a limpet to the Star Destroyer's surface, it went unnoticed.
It's pretty damn obvious that it doesn't actually have a cloaking device. If it did, why would it need to attach itself like that at all?
Han knew from experience (or military training?) that those cruisers got a blind spot somewhere, so he tricked them real good ;-)
if such small ships could have cloaking devices, surely Fett would have built one into his ship - but he just flew out of detection range, so no worries there ...