NIL HEARDRECEPTION LOG

NAVTEX

tier A · data

516.5 kHz USB · 2026-09-21 20:49:01Z · 10:00 · received at Assen | Netherlands

Spectrogram of NAVTEX, 516.5 kHz USB, 2026-09-21 20:49:01Z, 10:00: data 47% · mixed 27% · morse 23% · carrier 3% · tone 1596 Hz · keying 11.26 Hz depth 0.74
spectrogram 0–6.0 kHz · analysis blocks: morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.7 MB ⤓ Opus 2476 kB { }
What was heard
data 47% · mixed 27% · morse 23% · carrier 3% · tone 1596 Hz · keying 11.26 Hz depth 0.74 — dominant tone 1596 Hz, keyed at 11.26 Hz (depth 0.74). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Assen | Netherlands (JO32fx) · Active Loop antenna PAHGOR (serial nr: 001) built by ► PA0EBC ◀ 👍 · reported SNR 45 dB — thanks to the operator. Receivers
Provenance
sha256 bdd4c63c67351a4e5893056838c2ae731d66f109514499a73c1c7324da270164
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T2049Z-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