Nine Knots Marine 9K42 — Autonomous long-range electric yacht at sea
Autonomous Long-Range Electric Yacht

Crafted for Quiet
Ocean Independence

The 9K42 is a compact, efficient electric yacht — built for offshore passages at 7 knots,
designed for silent propulsion and genuine autonomy at sea.

12.8m Overall Length
80kWh Battery Pack
12 Hulls — First Series

A New Vision of
Electric Blue-Water Cruising

Nine Knots Marine was born from years of offshore experience and a clear conviction: the ideal ocean passage is quieter, simpler, and less dependent on fuel — a passage where the yacht disappears into the background and the sea takes centre stage.

We questioned every convention. We studied what breaks, what wears, what fatigues crews on long passages — and how electric propulsion, sober energy use, and robust onboard systems can reduce noise, maintenance, and dependence on marinas. Then we drew a yacht that answers those questions honestly.

Not a performance racing machine. Not a floating apartment. A proper offshore electric cruiser: safe, capable, energy-autonomous — and deeply satisfying to live aboard for weeks at a time.

Nine Knots Marine underway
"The sea demands honesty from a yacht. We designed one that can answer."
01 Founded on deep offshore racing experience
02 Designed in collaboration with veteran blue-water cruisers
03 Built to the highest structural standards

Designed for Electric Offshore Independence

Twelve metres of considered design. A hull conceived for low energy use, quiet electric cruising, and genuine independence offshore.

12.8 m Overall Length LWL ~12 m
4.0 m Beam Displacement hull, efficiency-optimised
6.5 t Displacement Light offshore E-Trawler
90 kWh Battery Pack 80–100 kWh LFP, 96V DC bus
2×25 kW Electric Drive Silent twin-motor propulsion
7 nd Cruise Speed Efficiency sweet-spot
Nine Knots Marine aerial view
The sea is better at 9 knots.

What We Built For

Offshore Safety

A double-skinned composite hull built to ISO Category A — ocean. Redundant steering, self-draining cockpit, structural integrity designed for survival conditions.

True Autonomy

Months at anchor without a marina. Solar, wind, and hybrid propulsion provide consistent energy independence. The yacht sustains itself so you can focus on the journey.

Seakeeping

A hull designed for steady, comfortable progress in all sea states. Moderate displacement, a deep forefoot, and generous initial stability translate into a calm, predictable motion at sea.

Comfort Aboard

Live-aboard quality without compromise. Insulated to Scandinavian standards, superbly sound-proofed, ergonomically considered. A space that feels like home after thirty days at sea.

Considered Simplicity

Every system selected for reliability, repairability, and ease of use. Nothing superfluous. The result is a yacht that two people can operate confidently, anywhere in the world.

Craftsmanship

European boatbuilding tradition applied to every surface, joint, and fitting. Premium teak, stainless, and composites, finished with the care that only a limited series allows.

Form Follows
the Sea

We took inspiration from the Scandinavian design tradition: that beauty is a consequence of honesty, not ornament.

Every line of Nine Knots' interior was drawn for a purpose — the angle of the chart table, the height of the companionway, the depth of the cockpit. Where other yachts layer on aesthetics, we stripped back to structure. The result is an interior that feels serene rather than styled.

On deck, a flush flush, uncluttered layout allows confident movement in any conditions. Halyards and sheets are led to a single point of control at the helm. The cockpit is protected, deep, and sized for long night watches.

The colour of oiled oak. The weight of a stainless fitting. The silence of an electric drivetrain at cruising speed. These details are not decorative. They are the measure of a serious yacht.

— The Nine Knots Design Studio, Nantes

For the Sailor Who Has Already Crossed Oceans

You have accumulated miles and wisdom offshore. You know the difference between a yacht that looks capable and one that is. You have lived through the compromises of previous boats and have a clear picture of what you would do differently.

Nine Knots Marine is for the owner who intends to use their yacht — not to keep it on a pontoon and charter it out. For the couple who want to cross the Pacific without a professional crew. For the experienced sailor who plans a circumnavigation and expects the boat to be ready before they are.

The transatlantic couple planning extended bluewater passages
The experienced solo or shorthanded offshore sailor
The owner seeking a lasting, considered investment in serious sailing

Technology in
the Service of Quiet Autonomy

Nine Knots Marine incorporates advanced systems with one guiding principle: they should make your life at sea quieter, safer, more energy-autonomous, and less dependent on shore infrastructure — not more complicated.

01

Hybrid Propulsion

Twin 25 kW electric motors on a 96V DC bus, providing redundancy and precise manoeuvring. A 7.5–9 kW diesel generator acts as a considered range extender — not a primary drive, but a reliable backup that extends offshore autonomy without complexity.

02

Energy Independence

Significant solar integration paired with a Victron architecture and MPPT charge controllers. Sized for hotel loads at anchor, partial recharge from solar alone, and minimal generator hours. In sunny latitudes, the boat can remain autonomous for months without relying on shore power.

03

Watermaker System

A 80 L/h reverse-osmosis watermaker, backed by 400 L of stainless tank capacity. Fresh water independence, anywhere. A secondary manually-operated emergency unit is fitted as standard.

04

Navigation & Safety Systems

Integrated Furuno radar, AIS, and chart plotter. Iridium satellite communication. EPIRB and life raft sized for the crew. All critical systems duplicated with analogue fallback. The electronics serve you — not the reverse.

Join the First Series

The initial production run is limited to twelve hulls. If your vision of offshore cruising includes silent electric propulsion and genuine autonomy at anchor, we invite you to register your interest. A member of our team will contact you personally to discuss your project.

Your information is treated with complete discretion and is never shared with third parties.

Thank you. We will be in touch shortly.

Speak with
the Studio

We welcome enquiries from qualified buyers and serious sailing enthusiasts. Reach us directly or complete the form.

Studio Nine Knots Marine
Nantes, Bretagne
France

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