Did a larger vessel sink the Relentless?

The Monterey Herald has an interesting interview with the brother of the missing Relentless skipper, fisherman John Pennisi. He says the fishing boat was inside shipping lanes where there is constant danger of collision with vastly larger cargo ships and liners. The Coast Guard is actively investigating what ships would have been in the area when the Relentless went missing. The story features good quotes from fishermen who work those waters about the dangers of collision.