The O'Day 39 is an American sailboat that was designed by Philippe Briand as a cruiser and first built in 1982.
[1][2][9][10] The design was built by O'Day Corp., a division of the Bangor Punta Corp., in the United States.
It has a masthead sloop rig, a raked stem, a reverse transom, an internally mounted spade-type rudder controlled by a wheel and a fixed fin keel or optional shoal draft keel.
[1][2] The boat is fitted with a Universal 44 hp (33 kW) diesel engine for docking and maneuvering.
[2] A 1982 review in Cruising World noted, "the hull design and deck layout are unmistakenly European, with a low, sleek trunk cabin rising from the foredeck; wide, uncluttered, cambered decks for easy mobility when the boat is heeled; and a tall, double spreader masthead sloop rig.