Nav aids

Loran c northwest pacific chain, 8930-Z, and korean chain, 9930-W, off air 0001Z to 0800Z daily 26 thru 28 apr

Western North Pacific · HYDROPAC 1224/11

issued: 2011-04-21 09:20Z
status: cancelled 2011-04-21 11:54Z (archive)
self-cancels: 2011-04-28 09:00Z
authority: NAVAREA XI 259/11 210747Z APR 11.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
1. LORAN C NORTHWEST PACIFIC CHAIN, 8930-Z,
   AND KOREAN CHAIN, 9930-W, OFF AIR
   0001Z TO 0800Z DAILY 26 THRU 28 APR.
2. CANCEL THIS MSG 280900Z APR.

Activity windows · 3 in this warning

opens (UTC)	closes (UTC)	local	length
2011-04-26 00:01Z	2011-04-26 08:00Z	—	7 h 59
2011-04-27 00:01Z	2011-04-27 08:00Z	—	7 h 59
2011-04-28 00:01Z	2011-04-28 08:00Z	—	7 h 59

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

Timeline

Cancel HYDROPAC 1224/11 and this msgcancelled by · 2011-04-21

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.