Shipowners looking to cut fuel costs and emissions have long faced an uncomfortable gamble: invest in wind propulsion technology without knowing, with any real confidence, what the return might look like. For a system that has not yet touched your vessel, that uncertainty carries serious financial weight.
GT Wings is now offering a way to change that calculation. The company has launched a performance assessment tool — built with independent modelling specialists and formally reviewed by classification society RINA — designed to give shipowners credible, route-specific savings estimates for its AirWing™ jet sail system before any hardware commitment is made.
The problem with early-stage wind propulsion decisions
Decarbonization pressure on the shipping industry is real and intensifying. Tightening regulations from the International Maritime Organization are pushing operators to act, yet many lack the standardized tools needed to evaluate new technologies before committing capital. That gap creates a difficult situation: the urgency to act is high, but the confidence to act is low.
Historically, early-stage performance assessments for wind propulsion have been inconsistent. Some were produced by the technology vendors themselves, making independent verification difficult. Others relied on methodologies that varied so widely between providers that comparing options became nearly impossible. For a financial officer or fleet manager trying to build a credible investment case, that inconsistency was a serious obstacle.
Wind-assisted propulsion is no longer a niche concept — adoption is accelerating across vessel types and operator sizes. That growth raises the stakes for getting pre-installation data right, both for individual investment decisions and for the broader credibility of the sector.
What GT Wings’ AirWing™ system actually does
The AirWing™ is not a conventional sail. GT Wings describes it as a Jet Sail system that uses controlled suction and blowing — rather than traditional sail geometry — to generate high aerodynamic lift. The design delivers strong performance while requiring a smaller deck footprint than many competing wind propulsion solutions.
The system is already in commercial operation. GT Wings has installed an AirWing™ unit aboard Carisbrooke Shipping’s MV Vectis Progress, and the company has received additional orders from Grieg Maritime Group. These are not pilot studies — they represent real commitments from established operators.
Beyond installed units, GT Wings has completed more than 80 early-stage performance assessments across a range of vessel types and routes. That volume of project experience gives the company a substantial empirical foundation, one that now informs the new assessment tool.
How the new assessment tool works
GT Wings partnered with Blue Wasp Marine, an independent maritime modelling firm, to build the tool. Blue Wasp developed it using its proprietary Pelican Suite™ web-based platform, which is designed to be technology-neutral — meaning it is not built around any single manufacturer’s assumptions or commercial interests.
At the core of the tool is a four-degrees-of-freedom, or 4DOF, physics-based modelling approach. This method runs route-based simulations that account for vessel type, operating profile, and specific AirWing™ configuration — producing estimates grounded in physical principles rather than simplified rule-of-thumb projections.
The outputs are practical and decision-relevant. Shipowners receive estimates of potential fuel savings, projected emissions reductions, and indications of how the technology might support regulatory compliance. Together, these give operators a structured starting point for building an early business case before any hardware is ordered or installed.
Why RINA’s approval matters
Independent verification is what separates a credible assessment from a marketing document. That distinction matters enormously in an industry where major capital decisions hinge on data quality.
Classification society RINA reviewed the Pelican Suite™ modelling methodology and granted an Approval in Principle. This confirms that the approach aligns with recognized industry standards — specifically MEPC circ.896 and the ITTC Guidelines for Wind Powered Ships (2024), two of the most authoritative benchmarks currently available in the field. Patrizio Di Francesco, Special Projects North Europe Business Development Manager at RINA, noted that the society is leveraging its newly developed Rules for Wind Assisted Propulsion Systems in granting the approval.
RINA’s institutional position adds further weight to the endorsement. The society is a member of the International Windship Association (IWSA), so its engagement with wind propulsion methodology is not incidental — it reflects a broader, ongoing commitment to the sector. For shipowners, that third-party verification addresses a credibility gap that has slowed wind propulsion investment for years. An approval from a recognized classification society signals that the numbers in front of them can be taken seriously.
What this means for shipping decarbonization
Standardized, transparent assessment tools could meaningfully lower the barrier to wind propulsion adoption. When operators across different fleet types and sizes can access consistent, independently verified savings estimates, the decision to evaluate — and ultimately invest — becomes easier to justify internally and to financiers.
The design of this tool is deliberate in that respect. By combining GT Wings’ accumulated project experience with Blue Wasp’s technology-neutral platform and RINA’s verification, the output is positioned as a reference document rather than a sales pitch. That distinction could matter as more operators begin their own wind propulsion evaluations.
The broader implication is one of timing. Maritime emissions regulation is tightening on a defined schedule, and tools that compress the time between initial inquiry and informed decision could play a meaningful role in how quickly wind-assisted propulsion scales across the global fleet. Watch for similar verification frameworks to emerge from other technology providers as the sector matures.
Carlos is an engineer with strong expertise in technical and industrial topics. He previously worked at international companies such as Siemens and speaks Spanish, German, English, and Italian.
