A jack up vessel working 24 miles northeast of Rügen stops floating altogether before it lifts a single blade, and the 21 turbines it is planting in the Baltic seabed will each carry a 775 foot rotor

Twenty four miles northeast of Rügen the Baltic runs flat and grey to the horizon.

No land shows. No sound carries in from shore.

What sits on this patch of water is a hull the length of a city block with four steel legs punched down through it.

Norse Energi came out of a Chinese yard to a Dutch design and was handed over on 15 January 2026, then named on 12 May at Vlissingen in the Netherlands.

The legs go down first. Then the hull climbs up them, and the whole vessel stops floating entirely.

Why would a ship deliberately quit the water it arrived on?

How a ship gets rid of the sea underneath it

Every crane barge afloat fights the same enemy, which is heave.

A swell of a few feet travels up the hull, into the boom and out to the hook, where it becomes several feet of swing at the top of a tower.

Nothing gets bolted to a tower flange that is moving.

A jack up vessel deletes that problem rather than damping it. Four legs, each about 390 feet long, run down through the hull on toothed racks until they find the bottom.

Hydraulic jacking gear then walks the hull up those legs until the keel sits clear of the water altogether.

From that moment the deck is not a ship. It is a temporary steel island standing on the seabed, and swell passes underneath it.

What the hook feels is zero heave, which is exactly what a bolted joint 500 feet in the air demands.

The deck, the crane and a seabed already finished

The hull runs about 496 feet long and 190 feet across.

Its open deck covers close to 60,000 square feet and it can carry roughly 16,100 tons of cargo in a single load.

The main crane is rated at 3,500 tons, which is about seven fully loaded jumbo jets hanging off one hook.

It works in water up to 230 feet deep and sleeps 130 people.

The seabed beneath it was finished long before it showed up. All 21 monopiles had been driven and every inter array cable had been laid and pulled in.

Towers, blades and nacelles leave Mukran Port on the German Baltic coast and load aboard in sequence, because each machine travels in several pieces and must be stacked in assembly order.

The dates and tonnages behind the lift

Norse Energi came out of a Chinese yard to a Dutch design and was handed over on 15 January 2026, then named on 12 May at Vlissingen in the Netherlands.

It started work at the Windanker site in June, under contract to Iberdrola.

The foundations there are not modest. Each of the 21 monopiles weighs about 2,315 tons and runs up to 275 feet long, driven into a seabed lying 135 to 148 feet below the surface.

The turbines are Siemens Gamesa machines rated at 15 megawatts apiece, for 315 megawatts across the site.

Added to two neighboring farms already standing, the cluster reaches roughly 1.1 gigawatts and is expected to supply around 600,000 people.

Cable work wrapped in early June and the first turbine components moved out of port days later.

Where the jack up vessel still runs into limits

Standing on legs solves motion. It does nothing about the calendar.

Baltic weather windows are short, and the season for heavy lifting runs only a handful of months.

Autumn swell makes jacking and precision bolting impractical, so the sequence has to close out before autumn or stand down until spring.

Completion is now expected at the end of this year, with full commissioning slipping into the next one.

Spacing is a second constraint. In a compact array every machine sits partly in the wake of its neighbors, and with only 21 of them each one carries an outsized share of total output.

Wake behavior in tight arrays is why offshore layouts get set to the inch rather than the yard.

Public project updates have tracked each of those slips as they happened.

What the vessel does after the last Baltic bolt

This is not a one project machine.

When the final nacelle is secured it leaves for the North Sea, where 197 turbines are waiting about 75 miles off the Norfolk coast.

That job runs to 2.9 gigawatts and will rank among the largest offshore wind farms anywhere on the day it comes online.

Both contracts were signed before the vessel lifted anything offshore at all.

It carries a hybrid power plant with a 4.2 megawatt hour battery, which absorbs the load spike each time the crane takes a heavy piece and cuts fuel burn through every cycle.

Owner DEME says the ships reflect an ambition to support customers delivering the next wave of offshore wind, which in practice means turning a grid of steel piles into a power station nobody on land will see.

Onshore the same demand is being met with far cheaper hardware, and fields of solar panels go up without a single jacking cycle.

Out here the window stays narrow, season by season, and the hull is already on the bottom with its crane swinging, as the delivery record shows.