Police divers will search a remote reef for an older sailor who apparently fell overboard into waters off central Queensland.

A companion noticed the 71-year-old was missing from the 15-metre vessel on Saturday afternoon.

He raised the alarm, sparking an aerial search of remote Cato Reef off Yeppoon but there’s been no trace of the man.

A police vessel left for the reef on Sunday but wasn’t expected to reach the reef until Monday.

Police have remained in touch with the 23-year-old man who raised the alarm.

The men, believed to be from NSW, had left Scarborough, just north of Brisbane, on Tuesday last week.