"Yeah, I guess you're right. We could always call over the SCAs too.."

Since that's one of the few upsides of being on a mission - having a way to contact each other very quickly like that.

"Then it should be fine as long as we're never too far away from other people." Especially since some people seem to be moving super fast. Like Ple Two says - they might just come flying over the horizon before they know it.