A gimbal is a pivoted support that allows rotation on a single axis. When two gimbals are employed, one mounted within the other like a gyroscope, a supported object can remain immobile, unaffected by any motion around it.
The gimbal was used on board ships as a early as the 17th century, allowing items like lamps or stoves to remain safely upright regardless of the rolling and pitching of the vessel. Today gimbals are used to mount everything from cameras to rocket engines. (Source: Key West Shipwreck Treasures Museum )
Modern day gimbals are automated for smooth cinematographic effect. The Feiyu Tech G4 with an iPhone 6 Plus S delivers some nice smooth ocean air earth footage.
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