Exercises

Hazardous operations 070800Z to 072000Z jun in area between 24-29S 23-49S and 043-27W 042-44W

Western South Atlantic · Brazil-south Coast · HYDROLANT 1721/18

What this record establishes

Archived notice · 2018-06-07 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 S 423/18 010254Z JUN 18.. Issued 2018-06-01 04:17Z. 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
Western South Atlantic · Brazil-south Coast. 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 · 1 in this warning

opens (UTC)closes (UTC)locallength
2018-06-07 08:00Z2018-06-07 20:00Z—12 h

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

issued
2018-06-01 04:17Z
status
Archived notice
self-cancels
2018-06-07 21:00Z
authority
NAVAREA V COASTAL S 423/18 010254Z JUN 18.
NAVAREA
NAVAREA V · named as the source of this relay
issued by
NAVAREA V COASTAL S
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-SOUTH COAST.
DNC 01.
1. HAZARDOUS OPERATIONS 070800Z TO 072000Z JUN
   IN AREA BETWEEN
   24-29S 23-49S AND 043-27W 042-44W.
2. CANCEL THIS MSG 072100Z JUN 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.
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

28 military exercises listed in force · see all

Record snapshot 2026-10-02 03:54Z; 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.