[4] The design was built by O'Day Corp. in the United States from 1973 until 1979, with 949 boats completed, but it is now out of production.
[6] The O'Day 20 is a recreational keelboat, built predominantly of fiberglass, with wood trim.
[1][4] The boat is normally fitted with a small 3 to 6 hp (2 to 4 kW) outboard motor for docking and maneuvering.
Maybe the only really bad feature was in the higher new price..."[4] In a 1974 review in MotorBoating described the design as having, "four full-sized bunks, head, galley sink, icebox and optional stove make her self-sufficient away from port.
And her shallow draft keel (14" centerboard up) and tabernacle stepped mast make her easy to trailer.