The hangar deck is one of the three main horizontal structures on a carrier (the flight deck and keel/double bottom are the other two), and it provides much of the stiffness and protection for the rest of the ship. Any damage from hits on a carrier should be contained outside the armored boxes that surround the hangar deck and engineering/living spaces below. When it's empty, you would have room to play two games of American football in the hanger bay. But when it's filled with fifty or sixty aircraft only inches apart, there is barely room to worm your way through the mass of landing gear, pylons, and maintenance equipment. The hangar deck is always packed with airplanes and equipment, though there is not enough room to strike down all of the air wing's birds at one time. This means that some of the birds must always be parked on the flight deck. Fortunately, Naval aircraft are designed to withstand the corrosive effects of salt water, and can take the punishment fairly well.
Just aft of the elevator bay is a large stowage area where the ship's boats are stacked, along with bulky items like forklifts, spare arresting cable reels, and spare engines. Moving aft from this holding area, you find the engine and maintenance shops, which completely fill the stern of the ship. Here the ship's Aircraft Intermediate Maintenance Division (AIMD) repairs, overhauls, and tests engines, hydraulic pumps, electronics boxes, and countless other mechanical components that keep planes flyable and combat-ready. The maintenance shops are divided up into small spaces where work is done that normally takes acres of workshops and hangars back ashore.
Farther aft of the AIMD shops, you again break out into daylight on the stern, or fantail, of the ship, an open area the full width of the hull, roofed by the flight deck, with projecting platforms and catwalks on either side. Mounted on the fantail are massive test stands, where aircraft engines can be strapped down and run at full power. Because no bit of open space goes to waste on a carrier, you'll only rarely find a time when you can just stand back here and watch the ocean go by. This is especially true during flight operations. If an aircraft should hit the stern (in what aviators dryly call a "ramp strike"), the fantail is going to be showered with flaming jet fuel and debris. Such accidents are very rare, but they do happen, which means that unless you work there, you aren't permitted on the fantail. So if you get to see this spot while under way, count yourself lucky.
Here also are one of the four (three on the Nimitz (CVN-68), Dwight D. Eisenhower (CVN-69), and Carl Vinson (CVN-70)) Mk. 15 Phalanx Close-In Weapons Systems (CIWS). A pedestal-mounted 20mm Gatling gun with its own tracking radar, the Mk. 15 is designed to knock down incoming missiles and aircraft. Phalanx has now been in service for almost twenty years, and is considered marginal against the latest threat systems (like the sea-skimming, Mach 2 Russian Kh-41/SS-N-22 Sunburn missile). The Mk. 15's will eventually be replaced by twenty-one-round launchers for the Rolling Airframe Missile (RIM-116A RAM). RAM is based on the classic AIM-9 Sidewinder air-to-air missile, with a modified seeker from a Stinger (FIM-92) man- portable SAM. RAM-much more capable than the Mk. 15-can actually destroy an incoming Mach 2 missile before it hits (or showers the ship with supersonic fragments).
Located below the Phalanx mount are the twin ports for the ships SLQ-25A "Nixie" torpedo countermeasures system. Nixie is a towed noisemaker streamed behind the ship when there is a threat of incoming torpedoes. The idea is that the "fish" will chase the towed decoy, and detonate against it instead of the ship. Since each decoy can be used only once, two Nixie decoys are kept at the ready, each at the end of a spooled tether in the stern. Finally, on a platform at the stem next to the Mk. 15 stands the instrument landing system. This is a stabilized "T"-shaped bar of vertical and horizontal lights, which helps a pilot on final approach judge the roll and motion of the ship.
Heading back forward into the hangar bay, you will probably notice the "spongy" feel of the deck, which comes from the grayish-black non-skid coating that is applied to seemingly every horizontal surface exposed to the weather. Non-skid-a mix of abrasive grit and synthetic rubber applied in a rippled pattern-keeps you from slipping on a wet, oily, or tilted deck, an all too common occurrence on a naval vessel. Up on the flight deck, the constant pounding and scraping of landing gear and tailhooks quickly erode the coating and expose bare steel. When this happens, maintenance crews mix up a batch and "touch up" worn spots. Also notable is the hangar deck's elaborate fire-suppression system, which can put enough foam into the hangar bay to drown the unwary. Fire hoses and mains sprout from every corner of the hangar bay, and damage control gear is also in evidence.
In the overhead are storage racks for everything from aircraft drop tanks to spare engines. You can even see a spare catapult piston-a steel forging as long as a bus-racked high on the wall of the hangar bay. In the forward part of the hangar bay on the starboard side are two more aircraft elevators, as well as the passageways that lead into the forecastle. Here you find more AIMD offices and shops, as well as most of the berthing spaces for enlisted personnel from the embarked air wing. Cramming almost six thousand personnel into a ship, even though it's close to a quarter mile long, makes for tight quarters. Even so, the enlisted and chiefs' berthing spaces on a Nimitz are still more comfortable than those aboard a submarine or older Navy surface warship.
For a young person coming aboard a warship for the first time, the cramped personal space may seem harsh. In fact, while personal space is spartan, it is nevertheless quite functional. Enlisted personnel get a stowage bin under their bunks, and a single upright locker about the size of the one you had back in high school. They can also stow some personal items in their workspaces, but they still must always plan ahead when packing to go aboard ship. For sleeping, crew will normally be assigned to a bunk (called a "rack"), which will be one in a stack of three. You will find around sixty racks in a berthing space, with an attached rest room/shower facility (what the Navy calls a "head"), and a small common area with a table, chairs, and television connected to the ship's cable system. Television monitors can be found in almost every space on board, displaying everything from the ship's Plan of the Day (called the "POD"), to movies, CNN Headline News, and the "plat cams"-a series of television cameras that monitor activities on the flight deck.
The racks themselves are narrow single beds, with a comfortable foam-rubber mattress, and basic bedding. There are also privacy curtains, a small reading lamp, and usually a fresh-air vent-often a vital necessity. While most of the interior spaces of a Nimitz are air-conditioned, even nuclear-powered chillers sometimes have a hard time keeping up with the hot and humid conditions in the Persian Gulf or the Atlantic Gulf Stream in summer. That stream of cool air on your face is sometimes all that lets you sleep. Other distractions on board can also keep you from getting rest, such as the launching and landing of high-performance combat aircraft on the roof. Crew members with quarters just below the catapults and arresting gear have a hard time sleeping when night flight operations are running, which is why the air wing personnel are berthed here. When the wing is flying, they would not be in their racks anyway.