NIL HEARDRECEPTION LOG

NAVTEX

tier A · mixed

516.5 kHz USB · 2026-10-05 22:29:31Z · 10:00 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-10-05 22:29:31Z, 10:00: mixed 53% · morse 40% · data 7% · tone 1602 Hz · keying 0.25 Hz depth 0.82
spectrogram 0–6.0 kHz · analysis blocks: morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.2 MB ⤓ Opus 2680 kB { }
What was heard
mixed 53% · morse 40% · data 7% · tone 1602 Hz · keying 0.25 Hz depth 0.82 — dominant tone 1602 Hz, keyed at 0.25 Hz (depth 0.82). 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 45 dB — thanks to the operator. Receivers
Provenance
sha256 75ec202226b3bc76a6cc95ee5cd20c72a045de7b2578f10c0540db8c0051774d
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-05T2229Z-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.
Related