Cairns Water Police are presently undertaking a search for a man believed missing in his vessel in waters in the Portlands Roads area.
The 54-year-old Lower Daintree man went to sea on March 16 in a 30-foot commercial fishing boat.
It is believed he was heading in a southerly direction in the Lockhart River and police hold concerns for his safety.
He has not been heard from since he left on March 16.
Water Police with assistance from Lockhart River Police will coordinate a full search at first light of the surrounding waters.
Police are additionally making inquiries with local fishers who may have been in contact with the man to assist to locate the vessel.
If you have information for police, contact Policelink on 131 444 or provide information using the online form 24hrs per day.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, by calling 1800 333 000 or via crimestoppersqld.com.au 24hrs per day.