NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

516.5 kHz USB · 2026-09-24 22:27:36Z · 09:09 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-24 22:27:36Z, 09:09: mixed 93% · morse 7% · tone 1591 Hz · keying 8.94 Hz depth 0.85
spectrogram 0–6.0 kHz · analysis blocks: morse mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.5 MB ⤓ Opus 2460 kB { }
What was heard
mixed 93% · morse 7% · tone 1591 Hz · keying 8.94 Hz depth 0.85 — dominant tone 1591 Hz, keyed at 8.94 Hz (depth 0.85). 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 42 dB — thanks to the operator. Receivers
Provenance
sha256 48518d30aaba9e5d343d261cb7b908787692c6ac4b79759cb2cd9d9775eaf75e
source 09:09 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T2227Z-516.5-navtex-518
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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