Search area mapped out in bid to find missing Coast Guard helicopter crew

Search teams looking for three crewmen from a Coast Guard helicopter that crashed into the Atlantic have successfully mapped out a section of water where they believe the aircraft's black box recorder lies.

But despite a 10-hour operation preparing the 100m by 100m area off Blacksod, Co Mayo, for a dive and underwater robot operation, large swells expected on Monday could hamper progress again.