What is "swoopers"

Usage examples of "swoopers".

These easily could be floated and towed by the swoopers in any quantity.

And swinging low from each ship on heavily weighted lines, ultroscope, ultrophone, and straight-vision observers keenly scanned the countryside, while intelligence men in the swoopers above bent over their instrument boards and viewplates.

We had only six small swoopers, but I had a plan in mind, as the result of our little raid on Nu-Yok, that would make this sufficient, since the reserves of inertron blocks were larger than I expected to find them.

The entire personnel, of course, was supplied with jumpers, and if each man and woman was careful to adjust balances properly, the entire number could also be towed along through the air, grasping wires of ultron, swinging below the swoopers, or stringing out behind them.