Nav aids

Hf communications and GNSS positional information may be disrupted by the effects of solar flares

Space Weather · HYDROARC 61/12

issued: 2012-07-02 21:00Z
status: cancelled 2012-07-03 00:00Z (archive)
authority: SWPC SOLAR STORM ALERT 022025Z JUL 12.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

SPACE WEATHER.
1. HF COMMUNICATIONS AND GNSS POSITIONAL INFORMATION
   MAY BE DISRUPTED BY THE EFFECTS OF SOLAR FLARES.
2. DURING INCIDENTS AT SEA, MARINERS SHOULD CHECK THEIR
   POSITION USING ALL ALTERNATE MEANS AVAILABLE.
3. CANCEL THIS MSG 03 JUL.

Timeline

Cancel HYDROARC 61/12 and this msgcancelled by · 2012-07-03

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.