The tethered gas balloon AERO30NG comprises a 6200m3 envelope, permanently inflated with helium, a net and a gondola. This is attached to the ground by a cable, controlled by a hydro-electric winch. The captive balloon AERO30NG lifts up to 30 passengers at a time to a height of 150 m every 10 minutes. It is non-polluting, removable and silent. An unsurpassed experience : Flight aboard a tethered gas balloon AERO30NG is a unique experience full of sensations for the passengers. Silent and without vibration, the gondola is open to the air allowing passengers to experience the sensation of being on a flying balcony 150 m in the sky (or 300 m depending on the site). A 360° panorama unfolds before them and in a single gaze they can take in the whole landscape.