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North Sea Cog

Type Object Region North Sea Time c. 1150–1450

The cog was the dominant merchant ship of the North Sea and Baltic in the 12th–15th centuries, widely used by Hanseatic fleets and central to norther…

Timeline

  1. c. 1150Frisian coast · FrieslandNorth Sea shipwrights developed the broad, shallow-draft cog merchant vessel, with a single square sail and sturdy hull suited to shoals and harbors, gradually replacing Viking-age longships as the main cargo carrier.
  2. 1381–1390Hamburg–London route · EnglandBetween 1381 and 1390, Hanseatic city fleets ran cogs between Hamburg, Bremen, Bruges, and London, carrying Baltic grain, Scandinavian fish, and Rhineland manufactures; the cog was the most common merchant ship type in the North Sea at this time.
  3. c. 1400Danzig · PolandIn the late 14th century, cog hulls grew larger and were fitted with ballistas and protective railings, taking on some armed escort duties for the Hanseatic League in the Baltic, with records of participation in naval conflicts with Denmark and England.
  4. c. 1450North Sea ports · North SeaFrom the mid-15th century onward, larger, multi-masted hulks and carracks gradually replaced the cog as the mainstay of oceanic and coastal trade, ending the cog's dominance in North Sea shipping.

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