A new safety drive by the Coastguard aims to reduce the response time to emergencies along North Dublin's coast.
Signs have been put up along the coastal areas of Howth to help the public identify their location while reporting on an emergency.
It's teamed up with Fingal County Council for the initiative, which will help ensure the quickest response is given to a casualty.
Fergus Cooney works with the Howth Coast Gaurd.
He says the cliff signs have already helped find a person with cardiac arrest.
The rescuer said the person who rang 999 could give the reference number to the Coast Gaurd, allowing them to get to the scene as quickly as possible.
"In the case of a cardiac arrest we need to get there and we need to get there fast," he said.
"This is absolutely a life saver," Fergus added.