NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

516.5 kHz USB · 2026-09-19 04:50:18Z · 10:00 · received at TREMOLAT (24), FRANCE

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-19 04:50:18Z, 10:00: mixed 93% · carrier 3% · data 3% · tone 2478 Hz
spectrogram 0–6.0 kHz · analysis blocks: data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.1 MB ⤓ Opus 2838 kB { }
What was heard
mixed 93% · carrier 3% · data 3% · tone 2478 Hz — dominant tone 2478 Hz. Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, TREMOLAT (24), FRANCE (JN04ku) · Vertical pylon isolated 11 meters (ou Mini-Whip dual FET) · reported SNR 42 dB — thanks to the operator. Receivers
Provenance
sha256 c2dffc78ff492021b863d7536671c0fa2c8956ce602869c05cf33efae4df4c80
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-19T0450Z-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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