John and Cordelia McMinn, both 26, left Hanalei, Hawaii in May 1976 aboard their distinctive homemade 25-foot trimaran named Drum and were never seen again. Family members knew they planned to sail to Washington State; the last confirmed sighting is of the couple boarding the trimaran. The Drum was described as a brown trimaran with white hulls, gold trim, main sail number 188, three other white sails and a multicolored drifter, Drum painted in green script on the outriggers, about 25 feet long and 16 feet wide, Hawaiian registry HA4674C on the main hull bow.

Their disappearance is presumed to have occurred at sea; no wreckage, debris, communication or confirmed sightings of the vessel or the couple turned up. The case remains open, logged as NamUs MP19254 for John, and was reported to the Lake Oswego, Oregon police years later. Investigators have cross-referenced unidentified remains but found no matches.

If anyone saw the Drum, remembers the couple in Hanalei before their departure, or has information about that 1976 voyage, please come forward.