I have come across several sites with information on the Escort Shuttle in my effort to research it, but most of them have conflicting information. The escort shuttle first appeared in the "official
EU in "X-Wing" I believe. If it wasn't in "X-Wing", it was in "TIE Fighter" for sure. Soyes it is an "official" EU vehicle. As for the specs on how it lands, I can't find any anywhere. My thought is that it might need its own docking platform, or it has a rather strange landing gear system. Another possibility is that it might be just designed to land on racks like the TIE fighters do.