Hazardous operations 0900Z to 1600Z daily 18 thru 23 mar in area bound by 00-24.10S 047-39.18W, 00-27.98S…
South Atlantic Ocean · HYDROLANT 498/24
What this record establishes
Archived notice · 2024-03-20 00:59Z
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 134/24 111230Z MAR 24.. Issued 2024-03-11 12:44Z. 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.
Related notices and cancellation links
Current notices and reporting history in the South Atlantic Ocean →
Activity windows · 6 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2024-03-18 09:00Z | 2024-03-18 16:00Z | — | 7 h |
| 2024-03-19 09:00Z | 2024-03-19 16:00Z | — | 7 h |
| 2024-03-20 09:00Z | 2024-03-20 16:00Z | — | 7 h |
| 2024-03-21 09:00Z | 2024-03-21 16:00Z | — | 7 h |
| 2024-03-22 09:00Z | 2024-03-22 16:00Z | — | 7 h |
| 2024-03-23 09:00Z | 2024-03-23 16:00Z | — | 7 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2024-03-11 12:44Z
- status
- Archived notice
- self-cancels
- 2024-03-23 17:00Z
- authority
- NAVAREA V COASTAL 134/24 111230Z MAR 24.
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V COASTAL
- sea
- South Atlantic Ocean
- position
- -0.399, -47.094
- 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 0900Z TO 1600Z DAILY 18 THRU 23 MAR IN AREA BOUND BY 00-24.10S 047-39.18W, 00-27.98S 047-17.00W, 00-36.23S 046-46.15W, 00-21.68S 046-41.55W, 00-13.18S 047-13.82W. 2. CANCEL THIS MSG 231700Z MAR 24.
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.
- 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.
Collected reports in this area · military exercises
51 within 180 nm since 2004 · 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.
- Hazardous operations 0900Z to 1600Z daily 20 thru 23 mar in area bound by 00-24.10S 047-39.18W, 00-27.98S…2024-03-20
- Hazardous operations 050900Z to 062100Z dec in area bound by 00-28.00N 048-02.00W, 00-28.00N 048-12.00W,…2023-12-01
- Hazardous operations 230700Z to 232100Z nov in area bound by 01-04.30S 048-37.10W, 01-06.00S 048-39.50W,…2023-11-18
- Hazardous operations 090800Z to 092100Z nov in areas bound by: a. 00-10.00N 048-02.00W, 00-10.00N…2023-11-04
- Hazardous operations 0900Z to 2100Z daily 27 and 28 sep in areas bound by: a. 00-00.00N 048-12.00W,…2023-09-22
- Hazardous operations 050800Z to 061700Z sep in areas bound by: a. 00-00.00N 048-12.00W, 00-10.00N…2023-08-31
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
9 military exercises listed in force · see all
Record snapshot 2026-10-03 19:16Z; 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.