The ETAP 39s is a recreational
keelboat, built predominantly of
polyester glassfibre-foam cored sandwich, with wood trim. It has a 7/8
fractional sloop rig with
aluminum spars, a deck-stepped mast, wire
standing rigging and a single set of swept spreaders. The hull has a
raked stem, a
reverse transom, with boarding steps, an internally mounted spade-type
rudder controlled by a
wheel and a fixed fin
keel or shoal draft keel, both with weighted bulbs. It displaces and carries of lead ballast. For sailing downwind the design may be equipped with an
asymmetrical spinnaker of . The boat has a
hull speed of . ==Operational history==