The ship will sail in the Arctic in late summer 2021, with a full summer season in Antarctica to follow.
Featuring a pair of custom-built submarines, 24 Zodiacs and 132 veranda suites, the vessel will be built to Polar Class 6 standards and called Seabourn Venture.
A second, yet-to-be-named, sister ship is slated to launch in May 2022.
Richard Meadows, Seabourn president, said: “The name Seabourn Venture is an exciting step in the process of launching even more immersive voyages designed specifically for the expedition traveller who dares to go beyond the norm in terms of destinations and experiences they seek.
“Combined with the team of 26 experts that will bring the expedition experience to life, we are going to draw on our pedigree to deliver breathtaking experiences, and I know Seabourn Venture is going to create lifetime memories for the adventurer that wants to go farther, into more remote destinations than they may have ever seen before, in true Seabourn ultra-luxury.”