NIL HEARDRECEPTION LOG

NAVTEX

tier A · data

516.5 kHz USB · 2026-09-25 02:39:58Z · 06:44 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-25 02:39:58Z, 06:44: data 38% · mixed 33% · morse 29% · tone 1596 Hz · keying 3.68 Hz depth 0.78
spectrogram 0–6.0 kHz · analysis blocks: morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 7.1 MB ⤓ Opus 1679 kB { }
What was heard
data 38% · mixed 33% · morse 29% · tone 1596 Hz · keying 3.68 Hz depth 0.78 — dominant tone 1596 Hz, keyed at 3.68 Hz (depth 0.78). 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 9507940b4017d3e4b0a87673e9a312375dd5db49fb71ae2d0999bb26f1e91365
source 06:44 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T0239Z-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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