Hexagon Buys Guidance Marine to Add Relative Positioning to Its Maritime Sensor Stack
Hexagon has agreed to acquire Guidance Marine, a Leicester-based maker of sensors that tell a ship how far it is from the thing it is trying not to hit. Completion is expected by the end of 2026, after which Guidance Marine will sit inside Hexagon’s NovAtel Positioning Division, part of the Autonomous Solutions Business Area.
The financial shape of the deal is modest. Guidance Marine booked roughly €22 million in revenue for the year ended 31 December 2025, at an operating margin above Hexagon’s group average. No purchase price was disclosed. For a company Hexagon’s size this is a bolt-on, and the interesting part is not the revenue line.
Absolute position and relative position are different problems
A vessel operating near an offshore platform needs two answers at once. Where am I on the planet, and where am I in relation to that steel structure fifteen metres off the port bow.
GNSS answers the first question. It does not answer the second, at least not well enough. Satellite positioning gives you a coordinate with an error budget, and the structure you are approaching also sits at a coordinate with its own error budget, and if it is a floating asset that coordinate is moving. Stack those uncertainties and you get a number that is fine for navigation and useless for holding a gangway against a wind turbine transition piece in three-metre swell.
Guidance Marine sells the sensors that close that gap. Laser, radar, microwave and vision systems that measure range and bearing to a target directly, using reflectors or the structure’s own geometry. The product lines have been in the market long enough to be defaults in their niche, and the company says its output is integrated with every major Dynamic Positioning system on the market.
That last detail matters more than the revenue. Guidance Marine is not competing with Kongsberg or Wärtsilä or Marine Technologies. It feeds them. The DP system is the automated control loop that keeps a vessel on station with thrusters instead of anchors, and it is only as good as the position references it is fed. Buying a company whose sensors already plug into every DP vendor’s system buys you a position inside a supply chain rather than a fight over it.
Founded 1991, sold 2026
Guidance Marine has been at this since 1991 and now serves customers in more than 40 countries across offshore energy, marine construction, ports and naval work. That is a long runway for a business of this size, and it points at what Hexagon is actually paying for: an installed base, a set of OEM relationships, and thirty-five years of failure modes already discovered on someone else’s schedule.
Hexagon’s stated logic is complementarity, and for once the word is doing real work. Its existing marine portfolio covers GNSS, correction services, anti-jamming and assured positioning. Anti-jamming is worth pausing on. Hexagon has been building out protection against GNSS denial and spoofing, which is no longer a theoretical concern in the Gulf, the Baltic or the eastern Mediterranean. A relative positioning sensor that works off a reflector on a platform leg does not care whether someone is broadcasting a false constellation. Sensors that fail independently of each other are worth more together than apart, and that is a defensibility argument as much as a product one.
The demand story is offshore wind and autonomy
The market pull here is straightforward. Offshore wind construction and maintenance put vessels alongside fixed structures constantly, in weather, with walk-to-work gangways that have tight motion tolerances. Every turbine installed is a recurring service call for the rest of its life. Marine construction and port automation push the same way, with the added factor that operators are trying to reduce crew and increase the share of manoeuvres that happen without a human hand on the joystick.
Autonomy raises the bar on sensing rather than lowering it. A human on the bridge can look out of the window and correct a bad position reference. An automated station-keeping loop cannot. The tighter the tolerance and the thinner the crew, the more redundant, independent position references a vessel needs, and the more each one is worth.
Hexagon’s Autonomous Solutions unit already sells into mining, agriculture and construction on exactly this logic. Marine is the same argument in a wetter environment with fewer buyers and higher per-unit prices.
What to watch
Two things. First, whether Hexagon leaves Guidance Marine’s DP-vendor neutrality intact. The company’s value rests on being integrated with everyone, and an owner with its own ambitions in maritime autonomy could put strain on that if it starts bundling. Second, whether this is the last marine acquisition or the first of several. NovAtel has been the vehicle for building a positioning portfolio piece by piece, and the gaps that remain in a full vessel positioning stack are visible from the outside.
Neither question gets answered before the deal closes.