Landing craft with tank

SAN DIEGO -- The U.S. Navy's newest amphibious assault ship is also its most advanced. Commissioned last year, the USS Makin Island (LHD 8) has a hybrid propulsion system -- with both electric and gas-powered drives -- that the Navy said saved $15 million during the craft's first, seven-month, deployment.

The Makin Island is 847 feet long and carries a crew of just less than 1,000 Navy sailors and about 1,200 Marines, and is equipped to carry out anything from combat to humanitarian missions.

In this photo, taken in the Arabian Sea, a landing craft air cushion leaves the Makin Island carrying an M1 A1 Abrams main battle tank.

As part of CNET Road Trip 2012, reporter Daniel Terdiman got a tour of the ship, and a firsthand look at many of its innovative systems.

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Photo by: U.S. Navy / Caption by:

USS Makin Island

The USS Makin Island carries a crew of about 2,200 personnel, and 29 helicopters -- 27 belonging to the U.S. Marines, and 2 belonging to the Navy. It also carries 6 Harrier airplanes (AV-8Bs), which can take off and land on the 847-foot-long flight deck.

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Photo by: U.S. Navy / Caption by:

Harrier landing

A Marine AV-8B readies for landing aboard the USS Makin Island, in this U.S. Navy photograph taken in the Arabian Sea. The vessel was assigned to the 11th Marine Expeditionary Unit, supporting maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility, according to the Navy.

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Photo by: U.S. Navy / Caption by:

Helicopter landing

In this U.S. Navy photo, "a qualified landing signalman enlisted...gives training to another [Navy] sailor as an MH-60S Sea Hawk helicopter assigned to Helicopter Sea Combat Squadron 23 lands on the flight deck of the...USS Makin Island."

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Photo by: U.S. Navy / Caption by:

Maintenance of helicopters

U.S. Marines carry out maintenance on AH-1Z Cobra helicopters assigned to Marine Medium Helicopter Squadron 268 on the Makin Island's flight deck.

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Marines and sailors

The crew of the USS Makin Island -- hundreds of Marines and Navy sailors -- lines up in this Navy photograph.

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Photo by: U.S. Navy / Caption by:

Takeoff

A Marine Harrier takes off from the USS Makin in this U.S. Navy photograph.

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Photo by: U.S. Navy / Caption by:

Supervising the controller stations

In this Navy photo, "Chief Air Traffic Controller Gavrila Brooks supervises the [Makin Island's] controller stations during flight operations" in the Pacific Ocean in June.

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Photo by: U.S. Navy / Caption by:

Bridge

A look at the bridge of the USS Makin Island from the flight deck.

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Photo by: Daniel Terdiman/CNET / Caption by:

Flight deck from 'Vulture's Row'

Just outside the ship's bridge is a lookout that allows anyone to view the flight deck without getting in the way. This is a view of the flight deck from the lookout, called "Vulture's Row."

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Photo by: Daniel Terdiman/CNET / Caption by:

Aircraft elevator

This is one of the Makin Island's two aircraft elevators. Though it doesn't have to move so fast, it can bring a helicopter or airplane up to the flight deck from the maintenance deck in about three seconds.

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Photo by: Daniel Terdiman/CNET / Caption by:

Ship control

Though the captain runs the ship, a young sailor is usually the one in charge of steering, which is controlled from this station on the bridge.

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Photo by: Daniel Terdiman/CNET / Caption by:

Primary flight control

A look up at the Makin Island's primary flight control area from the flight deck.

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Photo by: Daniel Terdiman/CNET / Caption by:

ESB control center

The Makin Island's entire engineering infrastructure -- its propulsion, water filtration, electric system, and so forth -- is run from this control center. But there are also dozens of workstations throughout the ship that can be used to control its propulsion, and switch between its electric and gas-powered drive systems.

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Photo by: Daniel Terdiman/CNET / Caption by:

Electric drive

Though not flashy to look at, this is the Makin Island's electric propulsion system, known as the auxiliary propulsion motor. Because it allows the ship to run without gas, the system -- the first aboard a U.S. Navy amphibious assault ship -- allowed the Makin Island to spend $15 million less on fuel during its first, seven-month, deployment than it could have.

The electric drive propels the Makin Island at speeds of up to 12 knots, or 13.8 miles an hour, about half the ship's top speed using its gas turbine engine. It also produces no additional emissions, and has no moving parts other than a rotor shaft.

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Photo by: Daniel Terdiman/CNET / Caption by:

Missile launchers

The Makin Island maintains a couple of "defensive" missile launchers, according to the Navy.

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Photo by: Daniel Terdiman/CNET / Caption by:

Miox system

This is the Makin Island's Miox system, which allows the ship to treat fresh water without the use of bromine or chlorine. This means the water can be put back in the sea without worries of pollution, and the system can also create a safe disinfectant that can be put in a bottle and sprayed on surfaces for cleaning.

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Photo by: Daniel Terdiman/CNET / Caption by:

Walter filtering membranes

In order to carry less water, the Makin Island has a water filtration system that relies on membranes to gradually convert salt water to potable water. Each of these tanks has a membrane, and the water is gradually put through each tank.

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Photo by: Daniel Terdiman/CNET / Caption by:

Gas engine

One of the Makin Island's two gas turbine engines.

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Photo by: Daniel Terdiman/CNET / Caption by:
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