Exercises

Hazardous operations are in progress in the South Atlantic until 060400Z June 27 near 24-39S 042-30W; two-mile berth requested.

South Atlantic Ocean · HYDROLANT 1457/26

What this record establishes

Listed in force

The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.

Source and dates: NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-07-29 00:59Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-10-01 05:17Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered: South Atlantic Ocean. 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 South Atlantic Ocean →

issued: 2026-07-29 00:59Z
status: Listed in force
self-cancels: 2027-06-06 05:00Z
sea: South Atlantic Ocean
position: -24.649, -42.506
nearest port: Niteroi · 112 nm
source: NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-08-17 13:41Z

Original warning text

SOUTH ATLANTIC.
1. HAZARDOUS OPERATIONS IN PROGRESS UNTIL
   060400Z JUN 27 IN AREA BOUND BY
   24-39.87S 042-29.30W, 24-39.78S 042-31.55W,
   24-38.97S 042-32.52W, 24-38.15S 042-31.55W,
   24-38.07S 042-29.30W, 24-38.97S 042-28.27W.
   TWO MILE BERTH REQUESTED.
2. CANCEL HYDROLANT 1456/26.
3. CANCEL THIS MSG 060500Z JUN 27.

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.
Wide berth requested: Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
Cancellation reference: A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROLANT: The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Conditions at the position · now

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MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation

Collected reports in this area · military exercises

680 within 180 nm since 1999 · 5 in the last 12 months · 1 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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

28 military exercises listed in force · see all

Record snapshot 2026-10-01 05:31Z; 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.