Persistent Signal Catalog · Class II
The 52-hertz whale
A whale call at an unusually high frequency, tracked for decades, apparently belonging to a single animal answered by none. A persistent signal with a source, and no reply.
A whale call at an unusually high frequency, tracked for decades, apparently belonging to a single animal answered by none. A persistent signal with a source, and no reply.
Public packet
- catalog abstract
- classification rationale
- public source links
Review controls
- Coordinate source
- Public location statement
- Uncertainty
- Location is descriptive and not a source attribution
- Release state
- External literature case retained for comparison
Processing notes
- source publication review
- coordinate normalization for Night Watch where available
- classification against FAL behavioral taxonomy
- retention as a public comparison case
Ordinary-source checks
- source interpretation retained from the cited literature
- public summary avoids unsupported origin claims
- comparison use is behavioral rather than evidentiary
Release limits
- interpretation remains with the cited source record
- FAL classification is behavioral and does not replace the original literature
- coordinates are shown only when stable public values are available