Maersk Tankers' voyage optimisation spin-off ZeroNorth is expanding its data reach by taking over partner Propulsion Dynamics.

The deal to acquire the Danish vessel performance company will add 15% to revenue and boost its Optimise platform with 25,000 ship-fuel consumption models.

Propulsion Dynamics was founded in 2002 and was the first company to offer full-scale digital "twin ship" performance analysis through its CASPER service.