snow

A snow is a square-rigged sailing vessel that looks much like a brig at first glance, but carries a critical difference: a third mast positioned just behind the main mast. This trysail mast, also called the snow mast, stands shorter than the fore and main masts and carries a fore-and-aft sail rather than square sails. The snow emerged in the 17th century and became common in European navies and merchant fleets through the 18th and early 19th centuries, particularly among British, Dutch, and Scandinavian seafarers.

The trysail mast is the snow's defining feature. Where a brig has only foremast and mainmast, both rigged with square sails, the snow adds a third mast stepped on deck immediately behind the mainmast, typically separated by 12 to 20 feet depending on the vessel's size. This mast carries a trysail, a large fore-and-aft sail that hangs from a gaff, giving the captain greater steering control in tight quarters and a more efficient sail plan when running before the wind. The arrangement allowed better balance than a pure square-rigged design while keeping most of the cargo-carrying advantages of the brig.

Service and variants

Snows appeared frequently as naval dispatch vessels, slavers, and merchant ships engaged in the triangular trade. Their size ranged widely; some were 300 tons burthen, others exceeded 600 tons. Smaller snows were favored as privateers and in coastal convoy work. The type proved particularly useful to the Royal Navy and East India Company fleets because the trysail mast allowed better maneuverability than full-rigged brigs without requiring the complexity or expense of a full ship-rigged three-mast design. By the mid-19th century, improved steamship technology and changes in naval architecture had made the snow obsolete, and few survived past 1850.

The name's origin remains debated among maritime historians. Some argue it derives from the Dutch word 'sneeuw' or Scandinavian roots; others suggest it came from the ship's quick, sneaking appearance. The etymology does not significantly affect understanding the vessel's function, but the term was never standardized internationally. French builders called similar vessels 'floutes' or 'corvettes,' and German yards used 'Schnau' or 'Schnau Brigg,' adding to the confusion when consulting period documents.

Anyone reading 18th-century naval records, merchant manifests, or prize lists will encounter snow repeatedly. Distinguishing one from a brig requires attention to the mast configuration in contemporary paintings, model documentation, or detailed descriptions. The presence of that secondary trysail mast, often drawn as a thinner vertical line close to the main mast, is the reliable visual clue. Modern maritime museums, including the Peabody Essex Museum and the National Maritime Museum at Greenwich, maintain detailed references on surviving snow plans.