Two walkers have been rescued by Dun Laoghaire inshore lifeboat, after they were cut off by a rising tide.
The pair raised the alarm by mobile phone and kept trying to walk towards shore.
But when they found themselves waist deep in the sea around half a mile off Sandymount, they returned to a sandbank to await rescue.
The coastguard helicopter based at Dublin Airport was also dispatched.
Both the chopper and the lifeboat arrived to help the people at 12.15pm.