Make one low pass to communication range in three hours, Scotty.

Jupiter knew they were now beyond communication range of the small walkie-talkies.

The communication range is less than 20 km in radius.

Within hours after passing beyond communication range, things began to happen behind him.

Our two ships are out of effective communication range now, but they're getting closer.

The Enterprise will be back within communication range in a few days.

If we could stay where we are, in communication range, I'd make more.

Since we're traveling at warp, we would almost immediately be out of communication range.

It'll only be a few days until we're in communication range.

At that time he may be within communication range to Sisshain.