The EnviroCat platform
Foil-assisted catamarans from 15 to 50 metres. Three paths from where you are to lower energy.
The EnviroCat platform is a configurable foil-assisted catamaran range delivered to yards as complete vessel designs and engineering packages, with a full-service foil retrofit option for operators who want the energy advantage on hulls they already operate.
Three paths from where you are
The platform is structured around three commercial offerings — each suited to a different operator starting point.
Path 1 — Foil retrofit on existing high-speed catamarans
For operators running diesel catamarans today.
The foil retrofit package adds the EnviroCat foil-assist hull architecture to an existing catamaran, cutting cruise-speed drag by 14–28% (21% mid-point) on higher-speed catamarans (≥22 kn) and 6–14% (10% mid-point) on lower-speed catamarans. The retrofit translates directly into fuel and emissions reduction across the host vessel’s remaining service life.
The retrofit service is full-scope:
- Feasibility analysis on your host vessel — hull characterisation, foil-fit study, classification path, cost and payback estimate.
- Complete foil-kit production sized to the host hull.
- Installation in cooperation with your yard or a partner yard.
- Performance monitoring and optimisation post-installation.
Less mature than the newbuild offerings; availability subject to case-by-case feasibility analysis.
Path 2 — EnviroCat newbuilds in diesel or hybrid configuration
For operators planning a newbuild without electrification yet.
An EnviroCat newbuild replacing a conventional diesel catamaran of comparable size delivers up to 50% lower drag at design speed, with proportional fuel and emissions savings expected. This is the right path for operators running routes where electrification is not yet practical — no shore power, long return legs, regulatory constraints, or operating environments that don’t yet support electric drivetrains.
The 50% drag advantage compounds across the vessel’s service life. For high-utilisation routes, it dominates the operating economics.
Path 3 — Foil-assisted electric EnviroCat newbuilds
For operators ready to electrify.
A foil-assisted electric EnviroCat newbuild reduces energy consumption by over 80% compared to a conventional diesel catamaran of comparable size. The combination of foil-assist drag reduction and the efficiency advantage of an electric drivetrain over a marine diesel drivetrain is what makes the platform economically and operationally feasible on routes where pure-electrification of a conventional hull would be marginal or impossible.
For routes that previously didn’t electrify because the battery weight made the duty cycle impractical, this is the path that opens them.
The vessel range
The EnviroCat platform spans 15 to 50 metres LOA across four standard models plus a Custom design programme for non-standard configurations.
| Model | LOA | Primary use cases |
|---|---|---|
| EC16.5 | 16.5 m | Small passenger ferries, crew transfer, taxi boats |
| EC18 | 18 m | Pilot, patrol, SAR, fire, workboats |
| EC22 | 22 m | Passenger ferries, ambulance, SAR, tourism |
| EC34 | 34 m | Passenger ferries, crew transfer, excursion, tourism |
| Custom | Up to 50 m | Bespoke configurations beyond the standard range |
All models share the same foil-assist hull architecture, the same propulsion-options matrix, the same classification framework (DNV HSLC), and the same design-and-license operating model.
A configurable platform
Each vessel is configured across five axes to fit the operator’s route and operating constraints:
- Vessel size — the standard models above, plus Custom up to 50 metres.
- Propulsion type — fully electric, hybrid, or ICE-powered.
- Propulsion supplier — controllable-pitch propellers (Kumera Helseth, Servogear), Volvo Penta IPS Electric pods, or waterjet propulsion. Electric drives from Brunvoll Mar-El, ZEM, or other compatible suppliers. The platform is propulsion-agnostic.
- Energy storage architecture — installed battery capacity sized to route, with CCS and MCS charging support.
- Use case fit — passenger, crew transfer, SAR, ambulance, fire, pilot, patrol, tourism, excursion, workboat, taxi boat.
Configuration matching is done through a consultative analytical engagement — not a sales pitch.
Next step
- If you operate diesel catamarans today and want to evaluate retrofit: request a retrofit feasibility study for your existing vessel.
- If you are planning a newbuild and want to scope vessel size and configuration: request a route and duty-cycle analysis.
- If you are a procurement body or fleet manager looking at multi-vessel programmes: request a fleet-renewal scoping briefing.
In all cases, the entry point is a 30-minute conversation that establishes fit before any commercial commitment.
[Book a 30-minute technical briefing] [Download the platform overview (PDF)]
For more on the platform’s design heritage and validation: Technology. For more on how we work with operators, yards, authorities, and technology partners: Approach.