Nav aids

Prn 24 unusable 201530Z to 210330Z apr

HYDROPAC 688/06

What this record establishes

Archived notice · 2006-04-20 23:26Z

This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.

Source and dates
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · COGARD NAVCEN ALEXANDRIA VA 171021Z APR 06.. Issued 2006-04-17 12:32Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
No named location parsed. No usable coordinates were parsed; a location-based nearby search is unavailable. Check the original wording for limits and qualifications.

Related notices and cancellation links

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2006-04-20 15:30Z2006-04-21 03:30Z—12 h

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

issued
2006-04-17 12:32Z
status
Archived notice
self-cancels
2006-04-21 04:30Z
authority
COGARD NAVCEN ALEXANDRIA VA 171021Z APR 06.
issued by
COGARD NAVCEN
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. PRN 24 UNUSABLE 201530Z TO 210330Z APR.
2. CANCEL HYDROPAC 686/06(71,72).
3. CANCEL THIS MSG 210430Z APR.

Reading this warning

Date-time group (DTG)
A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROPAC
The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
CANCEL THIS MSG
The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Nearby notices listed in force · within 120 nm

No parsed position is available for this comparison.

Worldwide in the collected sources

147 aids-to-navigation notices listed in force · see all

Record snapshot 2026-09-24 23:07Z; source collection times vary.

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.