A herring buss (Dutch: Haringbuis) was a type of seagoing fishing vessel, mostly used by Dutch and Flemish herring fishermen in the 15th through early 19th centuries.
The buss ship type has a long history. It was already known around the time of the Crusades in the Mediterranean as a cargo vessel (called buzza, bucia or bucius), and we see it around 1000 AD as a more robust development of the Viking longship in Scandinavia, known as a bǘza. The Dutch Buis was probably developed from this Scandinavian ship type.
The Buis was first adapted for use as a fishing vessel in the Netherlands, after the invention of gibbing made it possible to preserve herring at sea. This made longer voyages feasible, and hence enabled Dutch fishermen to follow the herring shoals far from the coasts. The first herring buss was probably built in Hoorn around 1415. The last one was built in Vlaardingen in 1841.
The ship was about 20 meters in length and displaced between 60 and 100 tons. The ratio of length to beam was between 2.5:1 and 4.5:1, which made for a relatively nimble ship, though still sufficiently stable to be seaworthy. It was a round-bilged keel ship with a round bow and stern, the latter relatively high, and with a gallery. The broad deck provided space to process the catch on board.
The ship had two or three masts. The mainmast and foremast (if present) could be lowered during fishing, leaving only the mizzen mast upright. It was square rigged on the main mast, with a gaff rig on the mizzen. It had a long bow sprit with jibboom and up to three headsails. The main course and topsail could be reefed.