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. watercraft
7. [watercraft by specific type]
8. [watercraft by method of propulsion]
9. sailing vessels
10. [sailing vessels by rig type]
11. square-rigged vessels
12. [square-rigged vessels: three or more masts]

Anotations

Scope note:

Use both for four-masted vessels of the late 19th and early 20th centuries, square-rigged on the two forward masts and fore-and-aft-rigged on the after two masts, or for three-masted vessels of the early 19th century, square-rigged on the foremast, fore-and-aft-rigged on the mizzen, and setting both square and gaff sails on the main.