NIL HEARDRECEPTION LOG

NAVTEX

tier A · data

516.5 kHz USB · 2026-09-23 19:40:26Z · 10:00 · received at Brettnach F57320

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-23 19:40:26Z, 10:00: data 70% · mixed 23% · morse 7% · tone 1596 Hz · keying 10.09 Hz depth 0.84
spectrogram 0–6.0 kHz · analysis blocks: morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.7 MB ⤓ Opus 2467 kB { }
What was heard
data 70% · mixed 23% · morse 7% · tone 1596 Hz · keying 10.09 Hz depth 0.84 — dominant tone 1596 Hz, keyed at 10.09 Hz (depth 0.84). 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 705bf18d3ffd44917fee189294f555e622b183c422f3f40fcb65512f2894c379
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T1940Z-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