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 function]
9. naval ships
10. naval auxiliary ships

Anotations

Scope note:

Unarmed ships staffed and equipped to provide hospitalization for wounded military personnel or to evacuate wartime casualties; marked according to standards of international law to allow for safe passage.