some kind of steadycam system that's mounted under a helicopter. it looks like a glass sphere and allows remotely moving the camerasystem within this sphere in a vibrationless and shockresistant way. the camera can be panned around 360 degress and is steered with a joystick. this system is used for the planet earth series.
what are the advantages and disadvantages of using a heligimbal
Some disadvantages of using a heligimbal system include increased complexity and weight compared to fixed mounting options, which can impact portability and ease of use. Additionally, heligimbals may require more maintenance due to moving parts, and they can be more expensive than simpler mounting solutions.