The News

According to Offshore Engineer, GustoMSC — NOV's offshore design and engineering business — has developed a new asymmetrical rack-and-pinion technology intended to increase the jacking capacity of offshore vessels. The development targets the structural and mechanical demands placed on jack-up systems as the offshore wind sector moves toward larger turbine installations requiring heavier lift and greater leg-load tolerance.

The asymmetrical geometry of the rack-and-pinion system is the core of the innovation: by redesigning the tooth profile away from the conventional symmetrical form, GustoMSC aims to redistribute load forces more efficiently through the jacking mechanism. The source description does not detail specific load ratings or vessel classes to which the technology would apply, but the framing positions it as a capacity-expansion solution for next-generation jack-up designs.

GustoMSC operates as NOV's dedicated offshore vessel design and engineering arm, with a portfolio spanning jack-ups, crane vessels, and wind installation units. The announcement represents an advancement within that existing design lineage rather than a departure from it.

Why It Matters

The offshore wind installation market is in the middle of a vessel capacity problem. As turbine ratings climb — and the nacelles, blades, and monopiles that accompany them grow proportionally heavier — the jack-up fleet that installs them faces a hard mechanical ceiling. Jacking systems are among the most load-critical components on any self-elevating unit: they bear the full weight of the vessel and its cargo while elevated, and they must do so repeatedly across a campaign that may span dozens of turbine positions. Any meaningful increase in jacking capacity without a proportional increase in structural mass is therefore commercially significant for vessel owners and operators.

The asymmetrical rack-and-pinion approach addresses this ceiling at the tooth-geometry level. Conventional symmetrical rack-and-pinion systems distribute contact stress evenly across both flanks of each tooth, which is mechanically clean but leaves potential load capacity on the table when the dominant load direction is known and consistent — as it is in a jacking system, where gravity defines the primary force vector. An asymmetrical profile can concentrate material and contact area on the loaded flank, improving load-bearing efficiency without requiring a larger or heavier overall mechanism. This is an established principle in gear engineering; GustoMSC's contribution appears to be its systematic application to the specific demands of offshore jack-up systems.

For vessel designers and shipyards building the next generation of wind installation jack-ups, a higher-capacity jacking system opens options: larger cranes, heavier preloads, or operation in sites with softer seabed conditions that demand greater leg penetration resistance. Each of these translates directly into contract eligibility for projects that current vessels cannot service.

From a Brazilian offshore perspective, the immediate relevance of this development is limited. Brazil's offshore energy agenda remains centered on pre-salt deepwater production, where FPSOs and semi-submersibles dominate the asset mix and jack-up technology plays a secondary role — primarily in shallow-water workover and well intervention contexts rather than installation campaigns. The domestic offshore wind pipeline, while growing in ambition, has not yet reached the contracting stage where specialized wind installation jack-ups would be mobilized at scale.

That said, Brazilian naval engineering firms, classification society offices operating in the country, and the broader supply chain that serves offshore vessel construction and modification have a professional interest in tracking where jack-up design is heading. NOV and GustoMSC maintain a presence in the global vessel design market that intersects with Brazilian shipyard activity, and technology shifts at the component level — particularly in load-bearing systems — eventually reach refit and upgrade specifications. Brazilian engineers working on jack-up assessments or vessel conversion projects will find the asymmetrical rack-and-pinion concept worth monitoring as it moves from announcement toward commercial application.

The deeper signal here is about the pace of specialization in offshore wind vessel design. The wind installation jack-up is diverging from its oil-and-gas-derived ancestor at an accelerating rate: higher cranes, larger deck loads, purpose-built leg geometries, and now redesigned jacking mechanisms. Companies with roots in oil-and-gas jack-up design — GustoMSC among them — are actively repositioning their engineering capabilities to remain relevant as that divergence continues.

Context

GustoMSC has a long design history in self-elevating units across both oil-and-gas and offshore wind applications, which gives it a comparative vantage point on how jacking system requirements differ between the two sectors. The wind installation market's demand for ever-larger vessels has been a consistent driver of design iteration across the industry for several years, with multiple naval architects and equipment suppliers revisiting component specifications that were largely stable during the preceding decade of oil-and-gas jack-up construction.

The rack-and-pinion system is not the only jacking mechanism architecture in use — hydraulic systems exist as an alternative — but rack-and-pinion remains dominant in large self-elevating units due to its load predictability and operational track record. Advances in its geometry, rather than wholesale replacement of the mechanism, reflect the incremental but substantive engineering path that characterizes mature offshore hardware development.