First look at Crystal's new polar-class expedition vessel

Endeavour will be accommodate up to 200 guests in all-suite, all-veranda, butler-service guest rooms. It will offer "Michelin-inspired" dining options across six venues, icluding Nobu Matsuhisa’s Umi Uma and Sushi Bar.

The ship will also feature a full-service salon and spa and state-of-the-art fitness centre.

Other features include mud rooms and a helicopter lounge, while a seven-guest submarine will allow for deep-water exploration of nearly 1,000ft.

Worldwide itineraries through 2023 are on sale now across three types of trip: remote expedition, exploring far-flung destinations and uninhabited locales; Cultural Discovery, with an emphasis on regions and their people; and Destination Exploration, highlighting natural wonders and beauty.

Regions range from the High Arctic, Antarctica, Svalbard, Iceland and Greenland to the tropics of Bora Bora and Indonesia, Africa’s Ivory Coast, the Chilean Fjords and Patagonia, western Europe, the Great Barrier Reef and New Zealand’s Sub-Antarctic Islands.

Each sailing will be accompanied by a team of expedition guides, who will be on hand to help guests gain greater insight into local landscapes, culture and history.