This is one of the largest indoor oceans ever built

Holding over 12-million gallons of water, the "MASK" — which stands for "maneuvering and seakeeping" — is one of the largest man-made indoor oceans in the world. It is located at the Naval Surface Warfare Center in Maryland.

The massive water containment measures 240-feet wide and 360-feet long and houses the ability to recreate real oceanic-like characteristics to help design future Naval vessels.

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With the ability to create a variety of ocean waves, the researchers can conduct numerous tests on new ship designs at the facility before the larger version is eventually produced.

"We can do a lot of different types of testing here, everything ranging from energy efficient testing to operability," Dr. Christopher Kent explains.

"As long as we've been building ships and boats, we really only started to understand how they work about the last 100 years," naval engineer Jon Etxegoian states. "And we're still not there yet."

The center's design experts work directly with Naval officials to produce the most advanced ships known to man before the blueprint is sent to the manufacturers.

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Check out Department of Defense's video below to watch this man-made ocean test the Navy's newest technologies.