United Earth Colonization Service (UECS) Ship Jean Monnet, AD 2524

You can't hear the crack of a flapping sail, thought Peace's chief engineer, Commander McFarland, detached to command the Monnet until he could train a replacement. You can't hear it but you can feel it.

That was true enough. As the sail's ring filled and it stretched out, it also stretched the thousands of filaments—the sheets—that bound it to the ship, sending a vibration even through that massive vessel, through the bearing that connected the bridge to that vessel, and through the captain's chair to which McFarland was strapped in the absence of gravity. Since, even when underway, the bridge of the Monnet contra-rotated against the spin of the main hull, there was never any gravity there anyway.

Others would go out later, in shuttles, to inspect the forward side of the sail. From where the engineer—no, the captain, now—stood, however, things looked—

"She's nearly as good as the day she was launched, skipper," said one of bridge crew. "Ninety-seven percent of the sheets show up as solid. We've enough in ship's stores to replace those which aren't."

McFarland nodded, then keyed his intercom for his propulsion section. "Your crew ready to get in their EVA suits and inspect the inside of the sail, Mr. Buthelezi?" he asked.

Came the answer, "As ready as they're going to be, skipper. They're already suited and lined up at the mast locks."

"Very good," McFarland said. "Do it."

* * *

In the very beginning, centuries past, it had been determined that lightships would require a mast to support the sail and for the sail to rest against when furled. Moreover, since the ships' primary means of both propulsion and breaking would be the light of a sun, either there would have to be two sails, or the entire ship would have to rotate to set the sail for braking, which would require reaction mass, or the mast and sail would have to rotate around the ship, which would require structural mass, machinery and, in a word, complications. It had been a very close call at the time. Nonetheless, the consensus had finally settled upon a rotating mast as being no more difficult to build and, in operation, somewhat cheaper.

Rumors that the decision was driven more by the particulars of ownership of the consortium that would build the rotating machinery were, of course, ruthlessly suppressed.

It was up this hollow mast, devoid of gravity but for the trivial tug of Luna, far below, that Buthelezi and two dozen suited midshipmen pulled themselves, hand over hand, through hard vacuum. Behind them, behind the closed hatch of the air lock, another group of twenty-five was already preparing to take their places.

EVA work was both tiring and dangerous.


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