In the 2010s, SpaceX contracted with a Louisiana shipyard to build a floating landing platform for reusable orbital launch vehicles. The platform had an approximately landing pad surface and was capable of precision positioning with diesel-powered azimuth thrusters so the platform can hold its position for launch vehicle landing. This platform was first deployed in January 2015 when SpaceX attempted a controlled descent flight test to land the first stage of Falcon 9 Flight 14 on a solid surface after it was used to loft a contracted payload toward Earth orbit. The platform utilizes GPS position information to navigate and hold its precise position. The rocket landing leg span is and must not only land within the -wide barge deck, but must also deal with ocean swells and GPS errors.