Nav aids

Due to space weather, hf communications and GNSS positional information may be disrupted by the effects of…

HYDROARC 306/23

issued: 2023-11-29 18:40Z
status: cancelled 2023-12-03 00:01Z (archive)
self-cancels: 2023-12-03 00:01Z
authority: NOAA SWPC 73/23 291824Z NOV 23.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. DUE TO SPACE WEATHER, HF COMMUNICATIONS
   AND GNSS POSITIONAL INFORMATION MAY BE
   DISRUPTED BY THE EFFECTS OF SOLAR FLARES
   30 NOV THRU 02 DEC.
2. DURING INCIDENTS AT SEA, MARINERS SHOULD
   CHECK THEIR POSITION USING ALL ALTERNATE
   MEANS AVAILABLE.
3. CANCEL THIS MSG 030001Z DEC 23.

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

193 aids-to-navigation notices in force · see all

Nav aids

Lights extinguished, buoys off station, RACON/NAVTEX outages. All current aids-to-navigation notices →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.