NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

488.5 kHz USB · 2026-10-01 21:48:14Z · 10:00 · received at Brettnach F57320

Spectrogram of NAVTEX, 488.5 kHz USB, 2026-10-01 21:48:14Z, 10:00: mixed 50% · data 43% · morse 7% · tone 1047 Hz · keying 8.13 Hz depth 0.89
spectrogram 0–6.0 kHz · analysis blocks: morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.8 MB ⤓ Opus 2488 kB { }
What was heard
mixed 50% · data 43% · morse 7% · tone 1047 Hz · keying 8.13 Hz depth 0.89 — dominant tone 1047 Hz, keyed at 8.13 Hz (depth 0.89). 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 44 dB — thanks to the operator. Receivers
Provenance
sha256 9f997227fdc86e75839d0bf7d22030373c2868fd1e9622f5d2f36479f1f1993b
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-01T2148Z-488.5-navtex-490
Heard in the record
— linked once the record exists.
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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