NAU US Navy Puerto Rico, continuous FSK

Field notes from the target list

fsk-nau-10153

NAU US Navy Puerto Rico, continuous FSK — Round-the-clock naval FSK; EiBi last heard 2026-08. Machine data, no addressee in the clear — Tier A, same reasoning as the weather fax. A steady two-tone warble. Alternatives 12120 (2026-07) and 5340 (2026-05). Expect data.

Gallery every take, whether or not its audio is published

• 2026-10-06 17:02Z · 10151.5 kHz
• 2026-10-06 10:11Z · 10151.5 kHz
• 2026-10-05 14:10Z · 10151.5 kHz
• 2026-10-03 19:29Z · 10151.5 kHz
• 2026-10-03 10:08Z · 10151.5 kHz
• 2026-10-02 10:29Z · 10151.5 kHz
• 2026-09-26 21:55Z · 10151.5 kHz
• 2026-09-26 15:48Z · 10151.5 kHz
• 2026-09-26 10:09Z · 10151.5 kHz
• 2026-09-25 16:27Z · 10151.5 kHz
• 2026-09-25 10:10Z · 10151.5 kHz
• 2026-09-24 21:09Z · 10151.5 kHz
• 2026-09-24 14:43Z · 10151.5 kHz
• 2026-09-24 10:00Z · 10151.5 kHz
• 2026-09-23 15:50Z · 10151.5 kHz
• 2026-09-23 10:51Z · 10151.5 kHz
• 2026-09-22 10:15Z · 10151.5 kHz
• 2026-09-21 15:19Z · 10151.5 kHz
• 2026-09-21 10:08Z · 10151.5 kHz
• 2026-09-20 14:29Z · 10151.5 kHz

All captures

data: index.json