The fog was so thick over the water that he carried out the run almost entirely by radar.

It may pick us up by radar, of course, but we'll have to take that chance.

"Without being able to use the ship's computer to calculate the distance of the ship by radar, we can't possibly know the size."

It was presumably an easy target to identify by radar.

We had discovered by radar that a small Japanese convoy was coming our way.

Name one type of information not readily obtained by radar.

"Pull one of the Hummers in close and track by radar."

The capsules descended in such a way that we could track them by radar.

Point is, to see by radar, you have to send.

The boats return before first light, find the nets by radar and retrieve them.