NIL HEARDRECEPTION LOG

NAVTEX

tier A · morse

516.5 kHz USB · 2026-10-01 22:19:03Z · 10:00 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-10-01 22:19:03Z, 10:00: morse 47% · mixed 40% · data 13% · tone 1602 Hz · keying 0.38 Hz depth 0.79
spectrogram 0–6.0 kHz · analysis blocks: morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.6 MB ⤓ Opus 2523 kB { }
What was heard
morse 47% · mixed 40% · data 13% · tone 1602 Hz · keying 0.38 Hz depth 0.79 — dominant tone 1602 Hz, keyed at 0.38 Hz (depth 0.79). 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 48e203b34258470dafc62694fcee4270c03e16fca3045dc42d731fe4dc2df0e4
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-01T2219Z-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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