Longship

Longships, also called longboats, were a type of sea vehicle used by the Vikings.

In 1066, the Monk planned to destroy the Vikings' fleet of longships with an atomic cannon to prevent King Harold Godwinson from having to fight King Harald Hardrada at Stamford Bridge, thus allowing King Harold to defeat William the Conqueror in the Battle of Hastings. This plan was defeated when Saxons from Wulnoth's village ran the Monk out of his monastery. (TV: The Time Meddler)

After being captured by Viking warriors, the Twelfth Doctor and Clara Oswald were taken two days by longboat to their village. (TV: The Girl Who Died)