NIL HEARDRECEPTION LOG

NAVTEX

tier A · data

516.5 kHz USB · 2026-09-22 19:17:54Z · 06:48 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-22 19:17:54Z, 06:48: data 57% · mixed 29% · morse 5% · keyed-tone 5% · carrier 5% · tone 1596 Hz · keying 8.50 Hz depth 0.85
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 7.3 MB ⤓ Opus 1673 kB { }
What was heard
data 57% · mixed 29% · morse 5% · keyed-tone 5% · carrier 5% · tone 1596 Hz · keying 8.50 Hz depth 0.85 — dominant tone 1596 Hz, keyed at 8.5 Hz (depth 0.85). 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 41 dB — thanks to the operator. Receivers
Provenance
sha256 465006a6ff4c260f9a91e9cf04d1571b20d1a88edae80326b3d2335f67c8a759
source 06:48 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-22T1917Z-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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