When Derek dropped them out of the astral -- and it was weird that it literally took that little space of time for him to be Derek, again, instead of Morgan in Marty's head -- Marty took a second or two to reorientate himself to both body and surroundings. He didn't need to ask if Robert was teleporting Alexis over to John's car so they could take to the air. He knew there wasn't any need to waste further air time confirming that plan. Not with Robert, John, and Alexis. Some others he wouldn't be too sure about.
"Derek says congratulations on the baby," he told Savannah as he reached to take the walkie.
"Alright everyone. Here's the plan. John and Alexis are going to get us coordinates based on directions from Morgan. They'll relay those to Robert, who'll start teleporting everyone there. We're going to try to take what cars we can. But, we may have to leave some behind. So, make sure your packs are close. We're going in this order: The Director's van, the supply trucks, the tanker, those cars with kids, Dr. Isles' car, Nell's car, Queen's car, Claudia's car. Any questions, now's the time. When we start moving I want absolute radio silence unless it's what I'd call an emergency."