… Balloons and dirigibles; gliders, hang gliders and other non-powered aircraft. …
Explanatory notes
… and dirigibles; gliders, hang gliders and other non‑powered aircraft. (I) BALLOONS AND DIRIGIBLES This group covers lighter‑than‑air aircraft whatever their intended use (military, sporting, scientific, publicity, … etc.). These comprise balloons , free or captive (i.e., moored to the ground by a cable), and mechanically driven …