Exercises

Hazardous operations in progress until 11 dec in area bound by 02-18.93S 044-22.02W, 02-13.79S 044-22.07W,…

South Atlantic Ocean · HYDROLANT 2987/21

What this record establishes

Archived notice · 2021-12-12 00:01Z

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 V COASTAL N 862/21 060201Z DEC 21.. Issued 2021-12-06 08:00Z. 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: 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: 2021-12-06 08:00Z
status: Archived notice
authority: NAVAREA V COASTAL N 862/21 060201Z DEC 21.
NAVAREA: NAVAREA V · named as the source of this relay
issued by: NAVAREA V COASTAL N
sea: South Atlantic Ocean
position: -2.174, -44.268
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-NORTH COAST.
DNC 01.
1. HAZARDOUS OPERATIONS IN PROGRESS UNTIL
   11 DEC IN AREA BOUND BY
   02-18.93S 044-22.02W, 02-13.79S 044-22.07W,
   02-01.95S 044-15.21W, 02-06.73S 044-08.44W,
   02-17.71S 044-17.66W.
2. CANCEL THIS MSG 12 DEC 21.

Reading this warning

DNC (Digital Nautical Chart): A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
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.
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

84 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

Depths less than charted in areas bound by: a. 02-10.17S 044-09.21W, 02-10.31S 044-09.39W, 02-10.35S…Wrecks · 6.8 nm

Worldwide in the collected sources

9 military exercises listed in force · see all

Record snapshot 2026-10-03 18:43Z; 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.