NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

516.5 kHz USB · 2026-09-23 23:49:34Z · 10:00 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-23 23:49:34Z, 10:00: mixed 93% · data 3% · morse 3% · tone 1596 Hz · keying 1.35 Hz depth 0.74
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 93% · data 3% · morse 3% · tone 1596 Hz · keying 1.35 Hz depth 0.74 — dominant tone 1596 Hz, keyed at 1.35 Hz (depth 0.74). 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 45 dB — thanks to the operator. Receivers
Provenance
sha256 84ed891dab72ec4e45eeaafdcc530279194ff5885277adfcddd7cc67d985fb71
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T2349Z-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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