The remains of the Francis Scott Key Bridge in Baltimore after it was struck by a container ship on Tuesday.

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Sachin Saxena is a former ship captain who spent 13 years navigating the globe on large ships. He breaks down the processes of entering and exiting ports in big vehicles like the Dali.In emergencies like power failures, a ship can't just stop and there's a lot of pressure onboard. 

This as-told-to essay is based on a conversation with Sachin Saxena, a...

Continue Reading I captained a sea-faring ship like the Dali for 13 years. Here's a breakdown of what happens in a crisis like this.