Navy's newest sub: 5 things about USS John Warner

Published 5:15 PM ET, Mon August 3, 2015
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There's no periscope. The new subs see the world through a photonic mast, which sends high-definition video, infrared images and other information by wire into the command center. Alex Lee/CNN
The Warner has no keel. The 337-foot submarine was assembled by welding together approximately 50-foot sections of hull, which had most of what's needed in each section already built in. Here the forward section of the Virginia-class submarine North Carolina is shown under construction in 2006. US Navy/Chris Oxley courtesy Northrop Grumman Ship Building
Personal space is at a premium, especially if you're tall. Most crew bunks, stacked atop each other, are only about 6 and a half feet long. And there aren't enough for all the sailors. If you're visiting, expect to sleep in the torpedo room between the torpedoes. Alex Lee/CNN
Laundry is a problem. There's one clothes washer and dryer for the entire crew of 135. Re-use those socks, sailor! Alex Lee/CNN
Dolphins love subs. USS John Warner Cmdr. Dan Caldwell said that when subs are cruising along the surface, dolphins are swimming along with them 90% of the time. Here a dolphin swims in front of the USS John Warner during its sea trials in May. Submariners actually wear medals on their uniforms that have dolphins on them. U.S. Navy/Chris Oxley/Courtesy of Huntington Ingalls Industries