Monark 606 is a sailboat class designed by Pelle Petterson and built in about 800 copies.
It is a small type of lightweight racing keelboat and has a combination of stability and characteristics of the dinghy, a flat bottom, a high-performance sail area, and a high power-to-weight ratio.
The 606 has a large cockpit relative to its size, with the rudder positioned on the transom.
National championships are regularly held in Scandinavia and Finland.