Investigators hope black box will hold the key to rescue 116 disaster

Investigators searching for the missing helicopter Rescue 116 are hopeful the black box will still be attached to the aircraft.

Pings from the box were detected by the search team yesterday and it's leading them towards the suspected crash site. A large search is underway again this morning off the Co Mayo coast for the three missing crew members of Rescue 116. Gerard O'Flynn from the Coast Guard says the black box should help them piece together what happened.