NAVTEX

tier A · data

488.5 kHz USB · 2026-09-18 21:49:51Z · 04:00 · received at Brettnach F57320

Spectrogram of NAVTEX, 488.5 kHz USB, 2026-09-18 21:49:51Z, 04:00: data 67% · mixed 25% · keyed-tone 8% · tone 1591 Hz · keying 0.20 Hz depth 0.97 — spectrogram 0–6.0 kHz · analysis blocks: keyed-tone data mixed

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.4 MB ⤓ Opus 991 kB { }

What was heard

data 67% · mixed 25% · keyed-tone 8% · tone 1591 Hz · keying 0.20 Hz depth 0.97 — dominant tone 1591 Hz, keyed at 0.2 Hz (depth 0.97). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.

Receiver

KiwiSDR, Brettnach F57320 (JN39GG) · vertical · reported SNR 41 dB — thanks to the operator. Receivers

Provenance

sha256 fc8a99cc7346432bb3698bfc52599d7d0c4c255fe686093fd65810fb356c1e48
source 04:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-18T2149Z-488.5-navtex-490

Heard in the record

— linked once the record exists.

Notes

rig: 490 kHz national NAVTEX, F1B 100 Bd +/-85 Hz SITOR-B; dial 488.5 USB -> mark/space ~1415/1585 Hz. Pinneberg (L) slot 21:50-22:00 UTC (German-language). https://en.wikipedia.org/wiki/List_of_Navtex_stations

Licence

CC BY 4.0 — credit NIL HEARD / Reception Log. The recording is ours; the transmission is somebody else's. Descriptions describe sound, never content — why.

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