NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

516.5 kHz USB · 2026-09-25 23:29:08Z · 07:35 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-25 23:29:08Z, 07:35: mixed 61% · data 35% · morse 4% · tone 1602 Hz · keying 11.86 Hz depth 0.91
spectrogram 0–6.0 kHz · analysis blocks: morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 8.1 MB ⤓ Opus 1883 kB { }
What was heard
mixed 61% · data 35% · morse 4% · tone 1602 Hz · keying 11.86 Hz depth 0.91 — dominant tone 1602 Hz, keyed at 11.86 Hz (depth 0.91). 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 43 dB — thanks to the operator. Receivers
Provenance
sha256 f89760b2827dc45c1cd958061ef289becf2e068917b8fb6a3ea0d7aea8a371e5
source 07:35 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T2329Z-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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