Resupply Pods

Is there any reason people don't throw them where they are going and not where they currently are? Unless we're going to be at a location for a bit (launching the nuke, starting up the generator, etc) i never understand when we're moving from one place to another and I hear "Calling in supplies" and i look around and its behind the group right next to the guy standing still, waiting. Why wouldn't you chuck it as far as you can in the direction we're all heading?