Nav aids

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

HYDROPAC 3789/23

issued: 2023-11-30 11:48Z
status: cancelled 2023-12-03 00:01Z (archive)
self-cancels: 2023-12-03 00:01Z
cancels: HYDROPAC 3788/23
authority: NOAA SWPC 0/23 300826Z 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 HYDROPAC 3788/23
4. CANCEL THIS MSG 030001Z DEC 23.

Timeline

Solar storm 302100Z nov until further noticecancels · 2023-11-30
Solar storm 302100Z nov until further noticereplaced · 2023-11-30

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.