A pair of snapper-boats flashed overhead, and vanished below the horizon. Two more swept past from another direction.
Rip watched, curious. What were they up to? Another pair quartered past them at high speed, then two more. The dozen boats seemed to be criss-crossing the asteroid in a definite pattern. Why?
A pair streaked past, and something sped downward from one of them, trailing yellow flame. It exploded in a ball of molten fire that licked across the asteroid in waves. Rip tensed, then saw that the chemical would burn out before it reached them.
"Fire bomb," Koa muttered.
Rip nodded. He had recognized it. The Planeteers were trained in the use of fire bombs, tanks of chemicals that burned even in an airless world. They were equipped with simple jets for use in space.
The snapper-boats drew off, back toward the Scorpius. Rip watched, searching for some reason for their actions. Then one of the boats pulled away from the others. It returned to the asteroid with stern jet burning fitfully.
"Is he landing?" Koa asked.
Rip didn't know. The snapper-boat was moving slowly enough to make a landing.
Directly over the asteroid it changed direction, circled, and returned over their heads. Rip could almost have picked it off with a pistol shot. Santos could have blasted it into space dust with one rocket.
The snapper-boat changed direction, and for a fraction of a second stern and side tubes "fought" each other, making the boat yaw wildly, then it[pg 152] straightened out on a new course.