Exercises

Hazardous operations 282230Z to 290200Z apr in area bound by 30-10.01N 088-01.30W, 30-11.21N 087-44.15W,…

Gulf of Mexico · NAVAREA IV 354/20

What this record establishes

Archived notice · 2020-04-29 03:00Z

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) · CCGD08 38/20 281100Z APR 20.. Issued 2020-04-28 11:06Z. 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: Gulf of Mexico. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.

Current notices and reporting history in the Gulf of Mexico →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2020-04-28 22:30Z	2020-04-29 02:00Z	—	3 h 30

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

issued: 2020-04-28 11:06Z
status: Archived notice
self-cancels: 2020-04-29 03:00Z
authority: CCGD08 38/20 281100Z APR 20.
NAVAREA: NAVAREA IV
sea: Gulf of Mexico
position: 30.084, -87.861
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF MEXICO.
ALABAMA.
FLORIDA.
1. HAZARDOUS OPERATIONS 282230Z TO 290200Z APR
   IN AREA BOUND BY
   30-10.01N  088-01.30W, 30-11.21N  087-44.15W,
   30-09.45N  087-45.47W, 30-04.03N  087-41.17W,
   30-02.53N  087-42.16W, 30-00.01N  087-38.32W,
   30-00.00N  088-01.30W, 30-10.00N  088-01.30W,
   30-10.01N  088-01.30W.
2. CANCEL THIS MSG 290300Z APR 20.

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.
Area bound by: Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
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 →

Collected reports in this area · military exercises

70 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.

Month of issue in the collected archive

All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.

Nearby notices listed in force · within 120 nm

Uscg remote communication facility new orleans 29-53.00N 089-57.00W mf and hf dsc off airNav aids · 109.3 nm

Worldwide in the collected sources

28 military exercises listed in force · see all

Record snapshot 2026-10-01 14:09Z; 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.