Watch the F-35B execute a vertical landing in rough waters with ease

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ABOARD USS AMERICA — The Marine Corps' F-35B is almost ready for its close-up.

The F-35B has entered the home stretch of sea trials on the amphibious-assault ship USS America off the coast of San Diego, California. The third and final stage of testing is 21 days of fine-tuning the fifth-generation stealth fighter's capabilities.

Stacking the deck, planners purposefully placed the amphibious warship in rough waters in order to evaluate how the pilot and aircraft would adapt.

Also read: Dogfighting in an F-35 is 'like having a knife fight in a telephone booth'

"There are smoother places that we could be," Andrew Maack, government chief test engineer and site director of the naval variants at Patuxent River, Maryland said during a briefing aboard the vessel.

"But we are actually looking for increased deck motion so we asked for the ship to be here for the purpose of it being a little bit more challenging envelope for the airplane."

Planners said the F-35B was testing in sea state 4 with swells of up to 6 feet accompanied with approximately 15 knots of wind.

The following 30-second video was shot from within an MV-22B Osprey and shows an F-35B hovering above the flight deck before executing a precise vertical landing.

Adjust the volume on your device before pressing play.

[facebook https://www.facebook.com/businessinsider/videos/10154047916929071/ expand=1]The jet is able to land perfectly and makes it look easy.

Ideal for the amphibious nature of the Marine Corps and unlike the Navy and Air Force variants, the F-35B is designed to perform short takeoffs and vertical landings.

The final round of testing aboard USS America is slated to conclude in mid-November.