Aliens Incidents Declassified Esoteric Places Creatures People Rabbit Hole

Home › Declassified › Sonar Anomalies › The Narrow Band Upsweep Case

The Narrow Band Upsweep Case

Key related concepts

The Mystery Sound In The Antarctic Convergence Zone
The Naval Facility Black Contact Log

Continue the trail

PreviousThe Mystery Sound In The Antarctic Convergence Zone NextThe Naval Facility Black Contact Log

Archive file

Archive Code: 0057
Category: Sonar Anomalies
Section: Declassified

Related

The Mystery Sound In The Antarctic Convergence Zone
The Naval Facility Black Contact Log

More in Sonar Anomalies →

© 2026 Project Black Echo. All signals reserved.

Contact About Sources