Strict controls are necessary in order to avoid a Titanic-style disaster in the Arctic Ocean, experts have warned, following the first ever cruise in the region.

The 68,870-gt Crystal Serenity (built 2003) sailed through the Arctic’s northwest passage in the summer.

It left the Alaska anchorage on 15 August and docked in New York a month later.

Tero Vauraste, boss of Finland’s Arctia, told Sky News: “Navigation in icy waters is made more difficult by poor satellite imagery.

“An