Lunch requires some special considerations aboard Alvin, the United States’ deepest diving manned submersible vessel. Inside Alvin, dives can last up to nine hours, and since the vessel lacks a bathroom, gastronomical distress among crewmembers could result in an aborted dive. Carl Wood, the steward of A/V Atlantis, makes special sandwiches to fuel the crew during their long trips below sea level.

In the video above, Atlas Obscura joins Alvin’s crew for lunch, 14,000 feet underwater.

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