There was no one aboard.
Greg Stephanoff has been reported missing since Oct. 2, when he left the Ala Wai Boat Harbor bound for Hanalei Bay on Kauai. A friend notified authorities he was missing two days later.
According to a 14th Coast Guard District press release:
On Nov. 7, crew members aboard the container ship Manukai notified the Coast Guard that they had come across what appeared to be a derelict sailing vessel named the C:Drive approximately 1,300 miles west of Oahu. The container ship attempted to communicate with the vessel on VHF channel 16 and made several blasts on the ship’s whistle in an attempt to contact anyone aboard. No one was observed aboard and the Manukai continued its course having no means of boarding.
The Coast Guard Cutter Kukui, a 225-foot buoy tender home ported in Honolulu, was dispatched to locate and board the sailing vessel. The trip took four days but the crew finally located the C:Drive and boarded the sailing vessel on Friday afternoon.
No one was aboard and there was no indication of what might have happened, Coast Guard officials said.
They did find a GPS and personal effects which are being examined.
The boat, a 42-foot Catalina sloop, was marked with paint and remains adrift.

Photo: Greg Stephanoff (Coast Guard photo)
—Patti Epler
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