The GREASE star, 56, is concerned about the whereabouts of her American partner of nine years, who was last seen on an overnight fishing expedition off California's San Pedro coastline between 30 June and 1 July (05).
On Sunday (21AUG05) the California Coast Guard put out a statement about McDermott's disappearance, saying, "We haven't really determined what happened to Mr McDermott and so we can't really say that he disappeared from that vessel."
In a statement released Monday, Newton-John says, "I'm hopeful that my treasured friend is safe and well, and I'm grateful to the officials who are working so hard to find Patrick, whom I love very much.
"I ask anybody with information that could help to please, please come forward."
The singer/actress' spokesman GAVIN DE BECKER added the star was in "close and frequent contact" with McDermott's relatives and friends.