Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Transportation Vehicles (hierarchy name)
5. vehicles (transportation)
6. air and space transportation vehicles
7. aircraft
8. [aircraft by form]
9. heavier than air aircraft
10. fixed-wing aircraft
11. gliders (aircraft)

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment
4. Transportation Vehicles
5. vehicles
6. air and space transportation vehicles
7. aircraft
8. aircraft by construction
9. ultralight aircraft

Anotations

Scope note:

Gliders in which the pilot controls altitude and glide path by shifting position in a suspended seat or harness; originally developed in the 1890s and, since the 1960s, ultralight aircraft with flexible wing surfaces.