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 the Battle of Stamford Bridge against King Harold Hardrada, and allowing King Harold Godwinson to defeat William the Conqueror in the Battle of Hastings. This plan was defeated when a group of Saxons 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)