Term: consort (maritime)
An unpowered Great Lakes cargo vessel, usually a schooner-barge, towed by a steam barge or a steamer. A large steamer could tow several consorts, each fully loaded with bulk cargo. The consort system began in the 1860s on the Great Lakes and persisted to
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[Source: "Glossary." Wisconsin's Great Lakes Shipwrecks (http://www.wisconsinshipwrecks.org/)]