Nor'easter at twenty knots. Just what we needed, Captain Marian Alston thought with satisfaction. She kept a critical eye and ear on the mast captains' work as the royals and topgallants were doused and struck.

"Clew up! Rise tacks and sheets!"

"Ease the royal sheets!"

The pinrail supervisor bellowed into the wind: "Haul around on the clewlines, buntlines, and bunt-leechlines!"

The upper sails thuttered and cracked as the clewlines hauled them up to the yards, spilling wind and letting the ship come a little more upright, although the deck still sloped like the roof of a house.

"Lay them to aloft," Alston said to the sailing master. "Sea furl."

The crew swarmed up the ratlines and out along the yards that bore the sails, hauling up armfuls of canvas as they bent over the yards; doll-tiny shapes a hundred feet and more above her head as they fought the mad flailing of the wet Dacron.

No sense in leaving that much sail up, on a night as dirty as this looks to be. Too easy for the ship to be knocked down or taken aback by a sudden shift of wind. The chill bit through the thick yellow waterproof fabric of her foul-weather gear like cold damp fingers poking and prodding.

She stood with legs braced against the roll and hands locked behind her back by the ship's triple wheel, a tall slim woman from the Sea Islands of South Carolina, ebony-black, close-cropped wiry hair a little gray at the temples; her face was handsome in a high-cheeked fashion like a Benin bronze. Spray came over the quarterdeck railing like drops of salt rain, cold on her face and down her neck. The sun was setting westward over a heaving landscape of gray-black water streaked with foam, and the ship plunged across the wind with the yards sharp-braced. Her prow threw rooster tails every time the sharp cutwater plowed into a swell, twin spouts jetting up over the forecastle from the hawseholes where the anchor chains ran down through the deck. Then the ship would heave free as if shrugging her shoulders, water foaming across the forecastle deck and swirling out the scuppers.

Alston smiled behind the expressionless mask of her face. Now this, this is real sailing, she thought.

The Coast Guard training ship Eagle was a three-masted steel-hulled windjammer. It had been built in 1936, and the original incarnation was called the Horst Wessel before the United States took it as war reparations. There were still embarrassing swastikas buried under the layers of paint here and there, but it was sound engineering, solid work from Blohm amp; Voss, the firm that built the Bismarck. Three hundred feet from prow to stern, a hundred and fifty to the tops of the main and foremasts, eighteen hundred tons of splendid, lovely anachronism. Good for another fifty years hard sailing, if the Powers That Be didn't decide to scrap her.

"Secure the forward lookout," she said. It was getting a little dangerous for someone to perch up in the bows.

"Come about, ma'am?" the sailing master asked.

"In a minute or two, Mr. Hiller," she said.

Nantucket was off to the northeast, fairly close, and it paid to be careful in the dark; the sea between the island and Hyannis on the mainland was shoal water, full of sandbars, and southeast was worse. She'd been tacking into the teeth of the wind for practice's sake; fairly soon she'd turn and let the Eagle run southwestward. Cadets and crew-people were swarming up the rigging; more stood by on deck, poised to haul on ropes. Archaic, but the best training for sea duty there was-the Coast Guard still taught stellar navigation, too, despite the fact that you could push a button on a GPS unit and get your exact location from the satellites. Lieutenant William Walker was taking a sight on Arcturus from the edge of the quarterdeck, and Victor Ortiz was running one of his pupils through the same procedure. Usually they did the first cruise of the season without cadets, but this year the Powers in their ineffable wisdom had changed the schedules a little. Completely rearranged them, in fact, causing everybody endless bother and inconvenience. It was a considerable relief to get out to sea, where a captain was her own master.

"The wind's southing, ma'am," Thomas Hiller, the sailing master, hinted.

"Brace them sharp, then."

The centuries-old litany of repeated orders echoed across the deck; Eagle had been built to operate the old-fashioned way, no high-geared winches or powered haulage. It ended with a boatswain's mate bellowing: "Ease starboard, haul port, lively port!"

"Heave!" shouted the line leader in a trained scream that cut through the moan of the wind.

"Ho!" chorused the twenty young men and women on the line, surging back in unison.

"Heave!"

"Ho!"

"Ma'am." Alston looked up. Hiller looked a little lost, which was a first. He'd been on the Eagle for eight years. "Ma'am… there's something odd about the compass reading."

An old-fashioned magnetic card compass binnacle stood before the wheels. She took a step and looked down into it; the card was whirling, spinning in complete circles. Captain Alston blinked in surprise. What on earth could cause that? The sky was clear to the horizon, only a little high cloud boiling in on the wind-unusually good weather for this time of year and these latitudes, although there might be a storm riding in on the nor'easter. No lightning, certainly. Then she noticed that the gyro repeater compass was quivering too.

Marian Alston had been in the Coast Guard much of her thirty-eight years, commanded the Eagle for four, and served on search-and-rescue craft and armed cutters before that; she'd joined up the year sea duty was opened to women. You learned to trust your gut. And never, never to trust the sea.

"Finish up and get them down," she said.

Cadets and crew poured down the ratlines, the latter sometimes helping the former along; for the first few weeks out, there would always be the odd officer cadet who froze a hundred and fifty feet up on a swaying rope.

A fat blue spark jumped from her hand to the metal housing between the ship's three wheels. Alston bit back a startled obscenity-you had to set an example-and shook her hand. Something white-hot stretched for an instant from sky to sea off to her left. More sparks flew; people were leaping and cursing all across the deck. Not the four hands standing on the benchlike platforms either side of the wheels, she noted with satisfaction. They flinched, their eyes went wide, but they kept her steady on the heading they'd been given.

Light flickered from left to right behind her, curving ahead of the ship in a line only a few hundred yards away- curving from east to west, in a line her navigator's eye could see was the arc of a huge circle. St. Elmo's fire ran along the Eagle's rigging, blue witch-flame. The curses were turning to screams as the lightning reared up into a crawling dome of orange and white overhead. Like being under the biggest, gaudiest salad bowl in the world, ran through her mind as she stood paralyzed for a moment. Then the noise on deck penetrated.

Easily. The roaring wind had dropped away to nothing in the space of a few seconds, and the drumhead-taut sails slackened and thuttered limp. The motion of the ship lost its purposeful rolling plunge, changed to a shuddering as the waves turned into a formless chop, and then to a slow sway as they subsided. Shouts and screams echoed through an eerie silence as the rigging's moaning song of cloven air died.

"Silence there!" she snapped, quiet but carrying. "Mr. Roysins, let's get some order here. Whatever's happening, panic won't help."

But it would feel so good, part of her mind gibbered, looking up at the dome of lights that turned night into shadowless day.