KH which is moving and non moving in first round

I just noticed that KH has no initative. My players are being escorted by a non-friendly fighter to land on planet. The PCs plan on attacking the escort so they can land at an alternate location. <div><br /></div><div>My PCs are firing first. Does that make them start as the moving or non-moving ship. They hope to use thier MPO assault rockets on the fighter so should I make them the moving ship because of that. That would mean a nearby orbiting ship will get to shoot at them first right?</div>