Exercises

Hazardous operations 121700Z to 122000Z jul within eight miles of 04-25.47S 032-52.23W

South Atlantic Ocean · HYDROLANT 2203/18

What this record establishes

Archived notice · 2018-07-12 21:00Z

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) · NAVAREA V COASTAL N 531/18 062137Z JUL 18.. Issued 2018-07-06 22:22Z. 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 parsed report position is -4.425, -32.870 with a 8.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the South Atlantic Ocean →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2018-07-12 17:00Z	2018-07-12 20:00Z	—	3 h

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

issued: 2018-07-06 22:22Z
status: Archived notice
self-cancels: 2018-07-12 21:00Z
authority: NAVAREA V COASTAL N 531/18 062137Z JUL 18.
NAVAREA: NAVAREA V · named as the source of this relay
issued by: NAVAREA V COASTAL N
sea: South Atlantic Ocean
position: -4.425, -32.870 · r 8.0 nm
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL.
DNC 01.
1. HAZARDOUS OPERATIONS 121700Z TO 122000Z JUL
   WITHIN EIGHT MILES OF 04-25.47S 032-52.23W.
2. CANCEL THIS MSG 122100Z JUL 18.

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.
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.
Within a radius of: A circular area — every position within a stated distance of a point.
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

349 within 180 nm since 1999 · 1 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

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

Worldwide in the collected sources

10 military exercises listed in force · see all

Record snapshot 2026-10-03 06:22Z; 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.