Editing Square rig (section)

== History ==
[[File:Humber Keel Ada Dews painted by Reuben Chappell.jpg|thumb|The single-masted, square-rigged [[Humber keel]] performed well to windward.<ref name="Mannering 1997">{{cite book |editor1-last=Mannering |editor1-first=Julian |title=The Chatham directory of inshore craft : traditional working vessels of the British Isles |date=1997 |publisher=Chatham Pub |location=London |isbn=1-86176-029-9}}</ref>{{rp|54}}]]
Single sail square rigs were used by the ancient Egyptians, the Phoenicians, the Greeks, the Romans, and the Celts. Later the Scandinavians, the Germanic peoples, and the Slavs adopted the single square-rigged sail, with it becoming one of the defining characteristics of the classic “Viking” ships.<ref>The Viking ship's single square-rigged sail. http://Longshipco.org/sail.html Retrieved 2018-8-20</ref>