PHUKET: Friends of an Australian woman who fell overboard from a yacht on its way to Phuket last Thursday, and who is still missing, are puzzled as to how such an accident could have occurred.

Michelle Black, a friend of the woman, said Dr Gerald Goeden and his partner Carmel Brookes were sailing from Lankawai Island to Phuket aboard the yacht Moondancer when Ms Carmel fell overboard.

Ms Black said the couple set sail from the Langkawi Andaman Resort, where they live, on or about January 23.