SB Wyvenhoe is an 83-ton, steel Thames sailing barge.

She traded under sail until 1923, when she converted to a motor ship.

She holds the record of having traded longer than any other British registered ship.

[1] She was owned in trade by London and Rochester Trading Company, then rerigged as company yacht barge by Richard Walsh in 1986.

She is now owned by Trad Sail Charters and based in Maldon.