| IMO | 9834648 |
|---|---|
| Gross tonnage | 7,892 GT |
| Length | 104.4 m |
| Beam | 18.4 m |
| Service speed | 12.0 knots |
| Builder | China Merchants Heavy Industry |
| Yard | Haimen |
| Hull number | CMHI-196-1 |
| Launched | 2019 |
| Maiden voyage | 2019 |
| Operator | Aurora Expeditions |
| Status | Active |
Overview
Greg Mortimer is a small polar expedition cruise ship operated by Aurora Expeditions and owned by SunStone Ships. Delivered in 2019, she was the first vessel in SunStone's Infinity class and the first passenger ship built around Ulstein's patented X-BOW hull form, an inverted bow intended to pierce smaller waves rather than ride over them and so give a smoother, more efficient passage in rough water. She was named in honour of Greg Mortimer, the Australian mountaineer and polar explorer who co-founded Aurora Expeditions, in a combined naming and delivery ceremony at the builder's Haimen base on 6 September 2019.
The ship represents a distinct turn in expedition cruising in the late 2010s: away from converted research vessels and icebreakers, and towards purpose-built, ice-classed passenger ships ordered by a specialist owner and placed on long-term charter to an operator. Aurora gained a ship designed from the keel up for landing small groups ashore in Antarctica and the Arctic from a comfortable, stable base ship.
No passenger-capacity figure is given in the spec box above. Published figures conflict — Wikipedia's infobox gives 126, Aurora's fleet listing has described 132 guests in 79 cabins, and reporting of her 2020 COVID-19 outbreak described up to 216 people on board in total — so no single figure is stated here as fact.
Key specifications
The dataset records Greg Mortimer at 7,892 gross tons, 104.4 metres long and 18.4 metres in beam, with a service speed of 12.0 knots. Wikipedia's summary adds a draught of 5.3 metres, eight decks and Polar Class PC6 / Polar Category B ice notation, consistent with the Infinity class as described by its designer, Ulstein.
What matters operationally is the combination: a ship small enough to work landing sites closed to large cruise ships, ice-strengthened for polar seasons at both ends of the world, and fitted with dynamic positioning and zero-speed stabilisers, which let her hold position without anchoring on sensitive seabeds and stay steadier while boats are loaded.
Design and construction
Greg Mortimer was built by China Merchants Heavy Industry at Haimen, Jiangsu, China, as hull CMHI-196-1. Her keel was laid on 12 June 2018 and she was launched on 12 March 2019, according to Wikipedia's ship summary. The project behind her began earlier: SunStone Ships signed its agreement with China Merchants in March 2017 for the first ships of what became the Infinity series, an attempt, in SunStone's own framing, to marry European design and quality with Chinese shipbuilding efficiency.
The design came from Ulstein Design & Solutions in Norway, to the CX103 expedition-cruise concept. The defining feature is the X-BOW, an inverted, wave-piercing bow Ulstein had long used on offshore vessels but never before on a passenger ship: instead of slamming into head seas, the hull cuts through smaller waves, reducing pitching, spray and fuel burn. Tomas Tillberg Design developed the interiors, and each charterer could modify the design during construction, so sisters are near-identical in hull and machinery but not exact copies inside.
For Aurora, the fit-out centred on expedition work: observation space, a lecture lounge, a mudroom for gearing up after landings, and dedicated platforms for fast loading of inflatable landing craft. Wikipedia notes 80 cabins; Aurora's material has put the cabin count slightly differently at different times, one more reason her passenger figures should be treated with care.
Naming, launch and maiden voyage
The ship was launched at Haimen on 12 March 2019. Unusually, her naming and delivery were combined in a single ceremony at the yard on 6 September 2019. Greg Mortimer the man had become best known, with Tim Macartney-Snape, as one of the first two Australians to climb Mount Everest, on 3 October 1984, and pioneered ship-based adventure travel before founding Aurora Expeditions in the early 1990s.
The dataset records both launch and maiden voyage in 2019. She entered service in the 2019–20 Antarctic season, the start of a pattern normal for her generation: alternating between southern and northern high-latitude seasons.
Career by operator
Greg Mortimer has had a single operator and a single name throughout her career to date. There have been no name changes and no transfers between cruise brands; the changes in her story are events within one continuous Aurora Expeditions charter from her SunStone owner.
| Period | Name | Operator |
|---|---|---|
| 2019–present | Greg Mortimer | Aurora Expeditions |
Within that charter, two developments are worth recording. In July 2023 she suffered propeller damage and went into dry dock; while she was out of service Aurora substituted a similar Infinity-class ship, Ocean Explorer. And trade reporting in late 2025 described a future seasonal charter under which National Geographic–Lindblad Expeditions would use the ship for part of the year from 2027, with Aurora retaining her for the rest of the year — a future arrangement, not a completed operator change.
Onboard character
Judged as a design of her era, Greg Mortimer is defined by two ideas. The first is the expedition base camp: a working platform whose important spaces are the observation decks, the lecture lounge, the mudroom and the boat-loading platforms, arranged so guests can get ashore quickly when weather and wildlife allow. Aurora's descriptions emphasise expansive observation decks and sea-facing cabins — a layout that treats the landscape outside, not an interior atrium, as the centrepiece.
The second is comfort in heavy weather. The X-BOW, stabilisers and modest size were all sold as answers to the Drake Passage problem. The result was an expedition ship that felt less like a converted workboat and more like a small, quiet, Scandinavian-influenced hotel that happened to carry landing craft — serious polar hardware outside, calm observation-focused spaces inside. That combination became the template the rest of the class, and much of the expedition newbuild wave that followed, was measured against.
Major refits and incidents
The defining incident of her early career came in April 2020, in the first wave of the COVID-19 pandemic. On a voyage in South American waters, passengers and crew began showing symptoms, and port after port refused her permission to disembark. Uruguay was the only country that allowed her to dock. Medical teams boarded from 1 April; 81 people initially tested positive, and the total eventually reached 128 cases among passengers and crew. Six seriously ill people were evacuated to hospital in Montevideo, evacuation flights for Australian and New Zealand passengers began on the night of 10 April, and on 18 April a 52-year-old Filipino crew member died of the virus. The episode left the ship one of the emblematic cases of the pandemic's first cruise season.
The only later casualty in the record is mechanical: the propeller damage of July 2023, described above. No major conversion or rebuilding is recorded; her refit history to date is repair, not transformation.
Sister ships and class
Greg Mortimer is the first of the Infinity class, Ulstein's CX103 design built by China Merchants Heavy Industry for SunStone Ships. Ulstein lists seven vessels delivered: Greg Mortimer (2019), Ocean Explorer, Ocean Victory, Sylvia Earle, Ocean Odyssey, Ocean Albatros and Douglas Mawson (2025). All share the same hull form, X-BOW and design philosophy, with details refined from ship to ship, and all were placed on long-term charters with different operators. The closest relatives in Aurora's own fleet are Sylvia Earle (2022) and Douglas Mawson (2025); the other sisters sail for competing brands — one owner, one design, several operators' colours in the same polar seasons.
Fate and where she is now
There is no fate to record in the disposal sense: the dataset lists Greg Mortimer as active and operating, and she remains in service with Aurora Expeditions, her only operator. She is a young ship, early in what her class's economics intend to be a long charter career, and each threat to it so far — a pandemic outbreak in her first year, propeller damage in her fourth — has been followed by repair and a return to service rather than withdrawal.
Sources: https://en.wikipedia.org/wiki/Greg_Mortimer_(ship), https://ulstein.com/projects/sunstones-cruise-vessels, https://www.seatrade-cruise.com/expedition-cruising/lindblad-expeditions-charters-greg-mortimer-for-alaska