Kaskelot is the flagship of the Square Sail fleet and is based out of her homeport of Charlestown, Cornwall, U.K. (though registered to Bristol). She is a three-masted barque and one of the largest remaining wooden ships in commission. The Kaskelot was built in 1948 by J. Ring-Andersen for the Royal Greenland Trading Company and brought supplies to remote coastal settlements in East Greenland. During the 1960s, Kaskelot worked as a support vessel for fisheries in the Faroe Islands.
Square Sail purchased her in 1981, then renovated her, redesigning and re-rigging her to replicate the Terra Nova. She has since been used in several TV series and films, and is also used for sail training programmes.