'The worst sound is silence': What happens when a ship goes dark?

Alex Pireson speaks with Sal Mercogliano, Maritime historian with Campbell University and former merchant mariner and host of ‘What's Going On With Shipping?’ on YouTube, about a cargo ship that lost power and rammed into a major bridge in Baltimore early Tuesday, destroying the span in a matter of seconds and plunging it into the river in a terrifying collapse that could disrupt a vital shipping port for months. Six people are missing and presumed dead. But what happens onboard the ship when everything goes dark? Learn more about your ad choices. Visit megaphone.fm/adchoices