The vessel is specially designed for long expeditions in rough seas.

Norwegian shipyard Kleven Werft has launched a 380ft (116m) expedition superyacht it built for New Zealand paper goods billionaire Graeme Hart.

The ship, currently called Build no. 370, is the second Kleven has built for the Kiwi businessman and his family. The group delivered the 350ft (107m) Ulysses superyacht in 2015.

The 66-passenger, high-spec mega yacht was designed by Norwegian-based ship designers Marin Teknikk working with Naval Architect Kyle Dick of New Zealand-based Oscar Mike Naval Architects.

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A statement from Kleven said that the high specification build no. 370 is a type “MT 5006 MKII Expedition Support Vessel (ESV) that’s been specially designed for long expeditions in rough waters, and blends a robust, hard-working character with luxurious added extras.”

Some of those luxurious extras reportedly include a helicopter deck and hangar, plus space for five excursion boats and several smaller boats for water sports.

Billionaire Hart, who is notoriously media shy, began his two expedition superyacht projects in secret with Kleven, which usually specialises in oil and fishing industry vessels.

The 60-passenger Ulysses ESV — similarly equipped to Build no. 370 — is currently in the Mediterranean, reportedly out for its first sail.

With an estimated worth of $7bn USD, Hart has not revealed how much he spent on either of his expedition superyachts, though estimates are in the range of $50m for each.

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