The Zeppelin NT is a class of helium-filled semi-rigid airships developed by the German company Zeppelin Luftschifftechnik since the 1990s, serving various purposes including aerial tourism, scientific research, and advertising. It is considered a modern successor to the original Zeppelin airships, with its first prototype taking flight in 1997. The airships are noted for their low-vibration flight capabilities, allowing for extended missions in environmental observation and other research fields.