Fuel has become a major issue for managers as the International Code for Ships Operating in Polar Waters — the so-called Polar Code — recommends not burning heavy fuel oil in the Arctic, with a ban possible.

That means using marine gasoil (MGO), diesel or hybrid technology as with Norway's Hurtigruten’s three expedition cruiseship newbuildings at Kleven Verft.

Low-sulphur fuels are “already pretty much part of the operation” in emission control areas, says Wilhelmsen Ship Management president Carl Schou, who notes that proactive owners already are preparing for future fossil fuel...