Other

Possible mf and hf radio interference 2200Z to 0800Z commencing daily 01 thru 16 mar vicinity gulf of alaska

Eastern North Pacific · Alaska-south Coast · Radio Services · NAVAREA XII 53/13

issued: 2013-02-27 00:58Z
status: cancelled 2013-03-17 09:00Z (archive)
self-cancels: 2013-03-17 09:00Z
authority: COMCOGARD SECTOR ANCHORAGE 22/13 262357Z FEB 13.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH PACIFIC.
ALASKA-SOUTH COAST.
RADIO SERVICES.
1. POSSIBLE MF AND HF RADIO INTERFERENCE 2200Z TO 0800Z
   COMMENCING DAILY 01 THRU 16 MAR
   VICINITY GULF OF ALASKA.
2. IF INTERFERENCE OCCURS, MARINERS ARE REQUESTED
   TO CONTACT U.S. COAST GUARD KODIAK ON 4125 KHZ
   OR PHONE: 907 487 5778.
3. CANCEL THIS MSG 170900Z MAR 13.

Activity windows · 16 in this warning

opens (UTC)	closes (UTC)	local	length
2013-03-01 22:00Z	2013-03-02 08:00Z	—	10 h
2013-03-02 22:00Z	2013-03-03 08:00Z	—	10 h
2013-03-03 22:00Z	2013-03-04 08:00Z	—	10 h
2013-03-04 22:00Z	2013-03-05 08:00Z	—	10 h
2013-03-05 22:00Z	2013-03-06 08:00Z	—	10 h
2013-03-06 22:00Z	2013-03-07 08:00Z	—	10 h
2013-03-07 22:00Z	2013-03-08 08:00Z	—	10 h
2013-03-08 22:00Z	2013-03-09 08:00Z	—	10 h
… 8 more

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

34 other warnings in force · see all

Other

Everything the classifier did not place elsewhere. All current other warnings →

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.