NTSB: Communications outage a factor in lift boat disaster

Read MoreA federal agency says an outage involving a Coast Guard marine warning system and “data gaps” in radar systems were factors in last year’s deadly capsize of an oil industry lift boat off Louisiana’s coastA federal agency says an outage involving a Coast Guard marine warning system and “data gaps” in radar systems were factors in last year’s deadly capsize of an oil industry lift boat off Louisiana’s coast