What caused Seattle-based crab boat to sink?

Two weeks of Coast Guard hearings into the sinking of the Seattle-based Destination begin Monday. They will put a spotlight on safety in the crab-boat fleet, and are expected to include testimony about the recent exploration of the sunken vessel by a remotely operated vehicle.

Source: >What caused Seattle-based crab boat to sink with 6 aboard? Coast Guard hoping to find out | The Seattle Times