![](https://flightsafety.org/wp-content/uploads/2021/11/black-rock-island-e1637082650242.jpg)
The pilots of a Sikorsky S-92A search and rescue helicopter were unaware, as they maneuvered toward a waypoint on the Irish coast in poor weather at night, that the waypoint was next to a 282-ft-high obstacle – a lighthouse and its surrounding terrain. The helicopter stuck the terrain and then plunged into the Atlantic Ocean, killing all four crewmembers.