NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

516.5 kHz USB · 2026-10-06 00:38:58Z · 10:00 · received at Montmorillon 86500 FRANCE

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-10-06 00:38:58Z, 10:00: mixed 43% · morse 30% · data 23% · keyed-tone 3% · tone 1602 Hz · keying 0.28 Hz depth 0.83
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.4 MB ⤓ Opus 2614 kB { }
What was heard
mixed 43% · morse 30% · data 23% · keyed-tone 3% · tone 1602 Hz · keying 0.28 Hz depth 0.83 — dominant tone 1602 Hz, keyed at 0.28 Hz (depth 0.83). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Montmorillon 86500 FRANCE (JN06kj) · Antenna Shared Apex SAL 30 array solution · reported SNR 46 dB — thanks to the operator. Receivers
Provenance
sha256 285d7743630368c4e0ecf586e1b671d501cf75921c81a3cd9119869362798101
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-06T0038Z-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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