"Coming in for a touchdown," said Tom. "Better strap in, sir!"

Connel nodded. He laced several straps across his lap and chest, gripping the sides of the seat. Tom sent the jet boat in a swooping dive, cut the acceleration, and brought the small ship smoothly inside the huge air lock in the side of the Polaris.

"I'd better get right up on the control deck and start warming up the circuits, sir," said Tom.

"Good idea, Tom," said Connel. "I'll try and pick up Manning and Astro."

Tom left the officer huddling over the communicator in the jet boat.

"Major Connel to Manning and Astro, come in!" called Connel. He waited for a moment and then repeated. "Manning—Astro, come in! By the rings of Saturn, come in!" There was the loud roar of an approaching jet boat. Shinny guided the ship into the Polaris with a quick violent blast of the braking rockets. The noise was deafening.

"Belay that noise, you blasted space-brained idiot!" roared Connel. "Cut that acceleration!"

Shinny grinned and cut the rockets. The jet-boat catapult deck was quiet, and Connel turned back to the communicator.

"Come in, Manning—Astro! This is Major Connel. Come in!"

On the opposite side of the airless satellite, Roger and Astro were busy digging a hole in the hard surface. Near by lay the last of the explosive units to be installed. Connel's voice thundered through their headset phones.