HONOLULU (AP) — The FBI says a Seattle man charged with the international kidnapping of his 9-year-old son could have sailed with the boy to Hawaii or other Pacific islands.

It's not known exactly when Jeffrey Ford Hanson set sail from Seattle with his son, Billy Hanson. They were last seen by authorities Aug. 28.

The FBI doesn't know where they went, but Coast Guard nautical experts say they may have traveled to the Hawaiian islands and beyond based on Hanson's sailing skills.

FBI agents in Honolulu on Wednesday asked Hawai’i's sailing community to look out for Hanson's 1976 White Cooper sailboat named "Draco."

A federal arrest warrant was issued for Hanson last month.

Billy was supposed to fly back to his mother in Pennsylvania on Sept. 4. The FBI says he never boarded the flight.

Hanson is accused of abducting Billy from Shilshole Bay Marina. The boy was last seen wearing black knee-length surf shorts, with no shirt or shoes.

Last month, agents in Seattle said they could be heading toward Mexico or islands in the South Pacific, but that the "possibilities are endless".

"Our focus is on helping the agents at the Seattle FBI recover Billy safely, so he can go back to his mom where he belongs," said Tom Simon, an FBI spokesman in Honolulu. “Hawa’ii and the islands of the Pacific have a vibrant sailing and nautical community, and we are appealing to that community to be on the lookout for this sailboat and contact authorities with leads.”

The FBI is also reaching out to authorities in American Samoa, Guam, the Commonwealth of the Northern Mariana Islands and nations in the Pacific.

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