Final update - Search and rescue operation, Far North Queensland

Police have concluded search and rescue operations for three fishermen missing off waters in Far North Queensland since Sunday July 10.

Extensive surface, air and land searches have been carried out by State Emergency Service volunteers, Volunteer Marine Rescue, water police, Special Emergency response Team personnel, coastguard vessels and fixed wing and rotary resources covering an estimated more than 3,000 square kilometres in the first day increasing daily, from Liverpool Creek to the northern most point of Cowley Beach, including the Flying Fish point foreshore.

Following the rescue of a fourth member of the group, found floating in waters off North Barnard Island Group on Monday July 11, all subsequent efforts have failed to locate his three companions, debris or items of investigative value following the failure of the stricken vessel's outboard motor and capsize.

Acting Inspector Cassowary Coast Patrol Group, Brett Jenkins said the outcome was heartbreaking for the families of the missing men, the rescued man, the community and search party alike.

"Regrettably, despite the best efforts of all members of the search and rescue team, whose dedication was nothing short of commendable, we have been unable to locate the men," Acting Inspector Jenkins said.

"I extend my deepest sympathies to the men's loved ones, who police remain in close contact with.

"Tragically, while we no longer hold out hope for a positive outcome, I ask the community to be vigilant, boaties in particular, who are asked to report any debris or information to police."

Police have kept family members briefed about the latest developments.

Inspector Jenkins urged boaties to be prepared and alert to conditions.

"Before you set out, ensure you tell a responsible person about your itinerary to raise the alarm early if you come into trouble," he said.

"Always take an EPIRB-and ensure all parties know where it's located and how to activate it, the earlier the better if need be. "And always, always don your life jacket at sea."

If you have information for police, contact Policelink by providing information using the online suspicious activity form 24hrs per day at www.police.qld.gov.au/reporting.

Report crime information anonymously via Crime Stoppers. Call 1800 333 000 or report online at www.crimestoppersqld.com.au.

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