The fourth vessel for SunStone Ships will be chartered by Vantage Cruise Line.

Contracted on fourth expedition cruise vessel for SunStone

Shipowner SunStone Ships has signed their fourth shipbuilding contract on an expedition cruise ship in their Infinity series. The vessel, which will be constructed at the CMHI yard in China, is a CX103 design featuring the X-BOW® and designed by Ulstein Design & Solutions.

The SunStone ship design contracts were the first cruise contracts for Ulstein, a ship design company with long experience from the offshore industry. Their innovative bow, the X-BOW®, has originally been developed for rough conditions, but has also the advantage of more space in the bow areas, areas which on these vessels have been taken in use for spacious lounges with great views.
 

Designed for luxury rides 

Vantage Cruise Line will be the charterer for the fourth vessel, the 'Ocean Explorer'. Planned cruises include East Asia, the Mediterranean and Scandinavia.

The Infinity Class vessels are 104,4 m long and 18,4 m wide. They have a passenger capacity of 130-200, and a crew capacity of 85-115, small enough to give an intimate atmosphere, large enough to yield all expected services and facilities, such as jacuzzi, bar and restaurant, boutique, an open-air cinema, gym and spa. The vessel harbours loads of gear for outdoor activities such as biking, kayaking or paddleboarding, and small tender boats.

Intercontinental cooperation 

The project is a worldwide cooperation, with the ship owner, operator (charterer) and ship interior designer in the US, the design company is Scandinavian (Norway), and the shipbuilding is carried out in China.

Representatives from Sun Stone Owner CMHI yard Tillberg interior designer UDS Ship designer and Equipment package Supplier and Makinen Interior Supplier

The first vessel in the INFINITY class, the 'Greg Mortimer', is in its final phase prior to her scheduled delivery in Q3 2019.

Ship number 1: Greg Mortimer
Ship number 2: Sylvia Earle
Ship number 3: Ocean Victory
Ship number 4: Ocean Explorer

Ships 5 onward: Optional

The number of firm Sun Stone vessels now counts four

Ulstein's contract is with the yard

Ulstein's contract is with the yard, from left Frank Zheng - Vice General Manager of China Merchants Heavy Industry (Jiangsu) Co.,Ltd and Lars Ståle Skoge - Commercial Director at Ulstein Design & Solutions AS.

Frank Zheng Vice General Manager of China Merchants Heavy Industry Jiangsu Co

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Aurora Expeditions' Douglas Mawson was officially named in Sydney on 27 November 2025 before embarking on her inaugural trip to Tasmania. This milestone marks history as the first expedition vessel featuring Ulstein’s X-BOW® design to operate in Australian waters. More than a striking visual signature, this pioneering hull shape represents a breakthrough in maritime engineering.