![Gosport tubes connected to a flying helmet](https://brooksidepress.org/cartmell/wp-content/uploads/2017/10/4598-Gosport-tubes-300x300.jpg)
A ‘Gosport Tube’ was a voice tube used by flight instructors in the early days of military aviation to give instructions and directions to their students. It was invented by flying instructor Robert Raymond Smith-Barry at the School of Special Flying he opened at Gosport(UK) in 1917.