Exercises

Hazardous operations 172150Z to 180200Z apr, alternate: a. 2150Z to 0200Z commencing daily 18, 19 apr and 21…

HYDROLANT 1139/01

What this record establishes

Archived notice · 2001-04-23 08:30Z

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) · NAVAREA II 138/01 291400Z MAR 01. Issued 2001-04-12 18:24Z. 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 · 3 in this warning

opens (UTC)closes (UTC)locallength
2001-04-17 21:50Z2001-04-18 02:00Z—4 h 10
2001-05-16 21:50Z2001-05-16 23:40Z—1 h 50
2001-05-22 21:50Z2001-05-23 22:00Z—24 h 10

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

issued
2001-04-12 18:24Z
status
Archived notice
self-cancels
2001-05-23 23:00Z
authority
NAVAREA II 138/01 291400Z MAR 01
NAVAREA
NAVAREA II · named as the source of this relay
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS 172150Z TO 180200Z APR, ALTERNATE:
   A. 2150Z TO 0200Z COMMENCING DAILY 18, 19 APR AND 21 MAY.
   B. 2150Z TO 0220Z COMMENCING DAILY 15 AND 17 APR.
   C. 162150Z TO 162340Z AND 222150Z TO 232200Z MAY.
   IN AREAS BETWEEN:
   A. 32-15N 33-30N AND 023-15W 021-45W.
   B. 09-30N 11-55N AND 038-55W 041-25W.
2. CANCEL THIS MSG 232300Z MAY.

Reading this warning

Hazardous operations
NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
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.
Position (degrees and minutes)
How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
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

9 military exercises listed in force · see all

Record snapshot 2026-10-03 12:11Z; source collection times vary.

Exercises

Gunnery, firing and naval exercise areas. All current military exercises →

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.