Description
Designed by Christian Jensen in 1929 the main is 9.7 sq.m and the jib is 2.8 sq.m. Hence, 12.5 sq.m. On January 13, 1930, the design was adopted by the Royal Norwegian Yacht Club (KNS) as the national ‘Junior Boat’. Later the boat was also equipped with a spinnaker – approximately 10 sq.m.
The 12.5 kvm Krysser (also known as the 12.5 kvm Cruiser or 12.5 m² Sloop) is a classic Norwegian wooden one-design sailboat class designed by naval architect Chr. Jensen in 1929. Originally conceived as a 15 m² cruiser, it was quickly rerigged to 12.5 m² sail area to address over-rigging issues, leading to its approval as a national junior class by the Royal Norwegian Yacht Club (KNS) on January 13, 1930. Intended for youth and family racing and cruising in Norwegian fjords and coastal waters, it features a long, narrow hull for speed and seaworthiness, with a reputation as a sturdy "hard weather sailor" after freeboard was raised to 40 cm. Production began slowly, with the first 11 boats built mainly at Vollen in Asker; wartime demand boosted numbers, reaching 64 by 1945 and totaling 124 registered hulls by the 1960s. Royal endorsement—boats gifted to Princesses Astrid and Ragnhild (C 62 "Astra") in 1947 and Crown Prince Harald (C 76 "Fram") in 1948—elevated its status, making it a "royal" class. The design spread from Oslofjord to the west coast (e.g., Bergen, Ålesund, Risør), with active fleets today in Risør and Ålesund Sailing Clubs. It's a development class with strict one-design rules, emphasizing traditional wooden construction (painted fir or varnished Oregon pine) and ongoing regattas, including National Championships (NM). Out of production since the 1960s, but six new builds were delivered from Vietnam in 2009.
