Rwos: See the slightly blue coloration of the Gallyava ship? That's a warp field. They're probably towing the field rather than touching the ship itself. Not standard procedure - probably why they took so long to leave earlier.
By the way, their ships don't have to be moving to go into warpspace.
*Ida's fighter takes out the other Shadow ship's engines*
*Ida's voice comes over the comlink* Rwos! I hope you've got something really good planned about now!