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Nat Geo-Lindblad charters Greg Mortimer in Alaska

The multi-year charter of the Aurora Expeditions ship begins in 2027

Last Updated

December 12, 2025

National Geographic–Lindblad Expeditions will charter the Ulstein X-BOW hulled small ship, the Greg Mortimer, for three years to enhance its own Alaska program, starting in 2027. Owned by SunStone Ships, the 340-foot vessel has been chartered and operated by Aurora Expeditions since 2019 on a long-term basis, alternating between Arctic and Antarctic waters each year.

This charter is directly between National Geographic-Lindblad Expeditions and Aurora Expeditions, and is limited to the seasonal Alaska program only, LATTE can confirm.

Aurora Expeditions’ Greg Mortimer entered service in 2019

Nat Geo-Lindblad says the move will meet “strong and growing traveler demand…enhancing its ability to explore more, offer new itineraries, and continue building on its pioneering legacy.”

Greg Mortimer‘s charter also comes as the expedition cruise line phases out National Geographic Sea Bird and National Geographic Sea Lion in 2026.

“I am incredibly proud of the exceptional, unique and intimate Alaska experience that our ships and our expert expedition team deliver,” said Natalya Leahy, CEO of Lindblad Expeditions.

“Demand for our Alaska voyages continues to grow, and I’m thrilled that with the introduction of a new ship to our Alaska fleet, we can welcome even more explorers and also offer exciting new itineraries to our collection.”

“We are equally grateful to honor the final farewell season of the Sea Bird and Sea Lion in 2026. These beloved ships have been the backdrop to countless memorable adventures for our guests over many years. We invite travelers to join us for this special farewell season.”

A cabin aboard Aurora Expeditions’ Greg Mortimer

The addition of the Greg Mortimer enables the company to grow on its nearly four decade long foundation, “continuing to innovate, explore more, and respond to guests who consistently ask for expanded ways to experience Alaska with Lindblad’s unmatched expertise,” the company said.

The Greg Mortimer brings capabilities that support the company’s vision to go farther and design new routes that deepen guests’ connection to Alaska’s wildest corners. Like National Geographic Endurance and National Geographic Resolution, but on a smaller scale, Greg Mortimer features the innovative Ulstein X-BOW for enhanced stability and comfort; as well as dynamic positioning to help protect sensitive seafloors; and multiple Zodiac loading platforms for seamless off-ship exploration. Expansive observation areas offer exceptional wildlife and scenic viewing.

National Geographic Sea Bird (pictured) and National Geographic Sea Lion will retire from the NatGeo-Lindblad Expeditions fleet in 2026.

Accommodating 154 guests, the vessel also includes dedicated learning and wellness spaces that complement the brand’s immersive expedition style.

The three-year charter strengthens the company’s ability to expand its itinerary portfolio and show guests even more of Alaska, guided by teams who know the region intimately.

The upcoming Alaska season will feature a collection of iconic places and experiences that showcase the region’s spectacular wilderness. Voyages will include time at the dramatic Hubbard Glacier, North America’s largest tidewater glacier, with excellent Zodiac and kayak opportunities, as well as travel through the scenic Inside Passage via Grenville and Princess Royal Channels, waterways ideally suited for small-ship exploration. These routes join the marquee experiences that have long defined Lindblad’s Alaska expeditions, including the Inian Islands, Misty Fjords, Endicott Arm and Tracy Arm, Southeast Alaska exploration days, and exceptional wildlife viewing throughout each voyage led by our expert expedition team.