I knew the performance of the unmanned med ships.

Other work will be directed at surveillance systems - partly by unmanned ships - of traffic on, below or above water miles out from the harbor.

Otherwise, it was the Three all over again-the first unmanned ship to be landed successfully on the moon surface.

"Blow up the whole damned planet - and do it with unmanned ships that have been programmed thousands of light-years away."

The unmanned ships would have been sent out in the direction of the original starships, which had been launched from orbit during the final days.

He told her of the grand design, more than a century old, to send an unmanned, fusion-powered ship to the stars.

You send unmanned ships first, by the slow but cheap path.

At ten million miles two unmanned ships, guided by remote control, flashed furiously toward the leading war-craft.

Synopsis: An unmanned alien ship suddenly appears from a point in space within the solar system and heads toward Earth.

A proposed idea is to use unmanned ships that shoot sea spray into the air.