Rescue 116 disaster: Pilot reported system flaws four years ago

Four months after the Rescue 116 disaster off Black Rock fresh questions have been raised about when the company responsible for an onboard warning system were first alerted to shortcomings in the system, writes Ciara Phelan.

RTÉ's Prime Time have revealed that a pilot had previously flagged the absence of Black Rock from the onboard warning system four years ago.