NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

516.5 kHz USB · 2026-10-02 00:30:09Z · 10:00 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-10-02 00:30:09Z, 10:00: mixed 70% · morse 27% · keyed-tone 3% · tone 1602 Hz · keying 0.40 Hz depth 0.81
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.0 MB ⤓ Opus 2892 kB { }
What was heard
mixed 70% · morse 27% · keyed-tone 3% · tone 1602 Hz · keying 0.40 Hz depth 0.81 — dominant tone 1602 Hz, keyed at 0.4 Hz (depth 0.81). 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 b5e0c1273a4018f58b38e216ad8ffe5c749f2502dfb417632526552fab2d2950
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-02T0030Z-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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