Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Information Forms (hierarchy name)
5. information forms (objects)
6. document genres
7. [documents by function]
8. correspondence
9. [correspondence by method of transmission]

Anotations

Scope note:

Refers to instances of formal written messages routed by a network of radio operators. These are plain text messages, with metadata, which are relayed through a chain of radio operators, the last of which volunteers to deliver the transcribed radiogram to its destination.