Aviation chiefs have banned drones from flying over the Trevor Deely search site in Chapelizod. Gardai are excavating three acres after new information came to light about his disappearance in 2000.
There are already stict conditions around the flying of drones in Dublin airspace; they can't be used above 50 feet or near other houses or property.
However a specific ban has been put in place above three acres of land in Chapelizod by the Irish Aviation Authority on foot of a request from the Justice Minister.
The scrubland has been sealed off from the public as Gardai carry out a dig as part of their investigation into Trevor's disappearance in December 2000.
Ian Kiely from Drone Consultants Ireland has trained detectives and Dublin Fire Brigade in the use of the machines.
He says there could be several reason why the temporary restriction:
"One, to give some privacy to the Gardai to do their work. They may have their own aerial systems in place like a helicopter so it could be very dangers to have a drone in the area. And as well as that, they may find something that the public isn't ready for, or perhaps they would like to speak to a family member first."
The dig is taking place after detectives received credible new information about Trevor's disappearance.
One line of inquiry is that the Naas man was shot by a known Crumlin criminal after a chance encounters in the early hours of the morning of December 8th.
Yesterday a gun was found by specialist officers however no connection to the case has been established.
The painstaking search and excavation of the land could take several weeks.