Accelerated Launch

The oak deadwood under the frigate's stern smelled of stagnant brine and sour vinegar as Fumitaka worked his gouge along the grain. In the narrow trough between the keel blocks and the muddy floor of Slipway Four, he had barely fourteen inches of clearance. Salt water sloshed against his ribs with every rise of the basin surge, cold enough to numb the meat of his forearms.

He did not need a lantern to find the true line. His left thumb rode the edge of the timber, feeling the bite of the curved steel as it shaved ribbons of wet heartwood. Three degrees of taper along six feet of oak: enough to keep the exterior four-inch copper plate sitting flush against the outer strake, while angling the interior backing bed just far enough out of true. When the hydro-magnetic resonance struck the lodestone array at launch, the vibration would not anchor cleanly into the granite sea-vein. It would direct ninety tons of kinetic recoil straight into the bronze fastening bolts and snap the sternpost like dry pine.

"You're taking off too much meat," Genzo whispered from the cradle staging. The apprentice was wedged sideways between two greasy hemlock props, his teeth chattering against the rim of his hemp collar. "The grain is weeping black sap. That’s bad water in the heartwood. Old Moritomo used to say if you cut against the sap-run during a falling tide, the vessel drinks her own crew."

"Old Moritomo died in a dry dock collapse because he couldn't tell dry rot from cedar," Fumitaka said without pausing the rhythm of his gouge. He caught a curl of shaved oak in his palm and stuffed it into his apron pocket. Loose shavings floating to the surface of the basin would draw every provost skiff within half a mile. "Hold the tallow cloth under my elbow. If I drop this iron into the mud, you're diving to the bottom to dig it out with your teeth."

Genzo reached down, his fingers shaking as he pressed the grease-soaked rag against the timber face. "How many plates left to bevel?"

"Seven," Fumitaka said. "If the tide gives us four hours before the morning watch, we finish the stern section tonight."

"And if Daigo checks the seams?"

"Daigo looks at hulls the way a tax collector looks at sheep," Fumitaka muttered, running his palm over the cut. The slope was even, smooth as oiled slate. "He sees wool, not the butcher's knife underneath."

A soft bump against the outer cofferdam timber cut the air.

Fumitaka went rigid, his knuckles pressed flat against the slimy face of the keel block. The rhythmic lapping of the basin water broke into uneven ripples. Through the lattice of the lower staging, a dark skiff drifted into the slipway shadow, gliding under the overhang of the granite pier without the scrape of oarlocks.

Daigo sat in the stern sheets, wrapped in a heavy wool mantle that hid his merchant's coat. A solitary oarsman in gray oilskin held the skiff against the cradle with a muffled boathook.

"Caulker," Daigo said. His voice was pitched low, carrying no louder than the hiss of harbor foam, yet crisp with the practiced authority of a man accustomed to buying silence. "You work slowly for someone whose foundlings are sleeping on wet straw in Sector Six."

Genzo drew his knees to his chest, shrinking back into the shadows between the hull frames.

Fumitaka wiped his gouge on his apron and reached into the bucket floating beside his knee. He grabbed a handful of raw pine pitch, cold and thick as tallow, and smeared it across the freshly beveled deadwood, sealing the exposed white grain beneath a greasy black rind.

"Cold water stiffens the joints," Fumitaka said, pulling himself up onto the lower planking of the cradle. Brine poured from his wool sleeves, splashing into the muck. "And your lodestone rods don't seat themselves. If I hurry the bed bolts, the bronze threads strip under torque."

Daigo stepped from the skiff onto the wet timber staging. He balanced with ease, stepping over greasy ropes without looking down, his dark eyes fixed on the frigate’s massive copper keel strake. A pair of silver-rimmed spectacles hung from a cord at his breast, swinging against his tunic.

"The provosts found an acoustic tuning key right here on the shallow step of Slipway Four," Daigo said, resting one gloved hand on the frigate's rudder pintle. "Captain Satoru has already doubled the gantry watch. I had to slip my skiff through the shadows of the lower canal while the upper marksmen were changing shifts. By mid-morning, marine inspectors will be prying up floorboards in every workshop from Pier One to the fish quay."

"Then you should have kept your couriers on a shorter leash," Fumitaka replied, setting his timber chisel onto the staging beam with a deliberate clatter. "We had provost gaffs dragging the trough three hours ago. If I hadn't sunk the lodestone housing under the bilge silt, Satoru's men would have had your frigate chained to the dock walls before midnight."

Daigo tilted his head, studying the dark line of the keel where Fumitaka had just laid the heavy pitch. He reached down, peeling back a strip of grease with a gloved thumbnail.

Fumitaka’s hand stayed near the heavy iron caulking mallet on the plank beside him. Beneath that layer of pitch, the three-degree bevel was hidden only by a thin sacrificial batten of green oak. If Daigo scraped two inches deeper, he would feel the uneven gap where the copper plate canted away from the structural centerline.

"The pitch is fresh," Daigo remarked, rubbing the black gum between his fingers. "Is the plate bolted beneath?"

"Bolted, seated, and caulked with horsehair," Fumitaka said, his voice flat as an iron plate. "Touch the lower edge if you want your gloves ruined, but don't knock the batten loose until the resin sets. If air pockets form between the copper and the deadwood, the salt water won't carry the resonance frequency to the granite reef. You'll ram the sea-gates with the force of an empty barrel."

Daigo wiped the pitch onto the staging post. "I know the theory, Caulker. That is why I hired your hands instead of some drunken yard laborer."

"Then let the hands finish the work," Fumitaka said. "Give me two more night shifts to seat the forward twelve plates. We will have the entire kinetic array tuned before the next spring tide."

"There is no next spring tide," Daigo said.

Fumitaka stopped. The basin water lapped against the hull, hollow and heavy. "The contract said four days."

"The contract is rewritten by circumstance," Daigo said, stepping closer. The smell of clove oil and dry wool cut through the stench of the bilge. "Satoru is bringing two squads of combat engineers from the citadel at dawn. They are bringing deep-water drag chains. If this vessel is still sitting on her blocks when the sun clears the east mole, she will never leave the basin."

"You can't launch an incomplete array," Fumitaka said, keeping his tone measured, though every muscle in his back locked tight. "Seven plates are still unseated along the keel. The lodestone core won't harmonize without the full circuit."

"Then you will seat them tonight," Daigo said. "The sluice gates open at midnight on the high water. You have less than twenty hours."

"That is impossible for two men," Fumitaka snapped. "Even working without sleep, bolting fourteen-inch bronze pins through seasoned white oak takes muscle and time."

"Then you will use the girl," Daigo said quietly. "Saki has small hands. She can crawl the interior bilge channels to secure the retaining nuts while you drive the pins from below."

Fumitaka's breath caught in his throat. He looked at Daigo's calm, aristocratic face in the dim harbor reflection. "Saki stays in the cellar."

"Saki comes to Slipway Four at dusk," Daigo replied, turning back toward his skiff. "Along with the two younger boys. If the frigate clears the outer lock at midnight, they board the escort sloop with the clearance chits I promised. If the frigate does not launch, I will leave their cellar door unlatched when Captain Satoru begins his morning sweep."

The broker stepped down into the skiff. The oarsman shoved off with the boathook, and the small boat slipped into the black water between the piers, vanishing into the fog of the lower canal without a sound.

Genzo crawled out from behind the timber props, his skin gray in the murk. "Master... midnight? We can't shim seven plates by midnight. The math... the bevels..."

Fumitaka picked up his gouge from the staging beam. The cold edge of the steel was slick with black pitch.

"Crawl through the drainage culvert before the dawn watch turns over," Fumitaka said, stepping back down into the freezing water. "Get to Sector Six. Tell Saki to pack the augers and the grease pots. We don't have four days to break this ship."

He set the chisel against the next block of white oak and struck the pommel with the palm of his bare hand.