Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.
South Atlantic Ocean · HYDROLANT 1462/26
What this record establishes
Cancelled notice · 2026-09-23 14:45Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-07-29 08:47Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-09-18 03:47Z. 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 08:47Z
- status
- Cancelled notice
- self-cancels
- 2026-09-12 00:01Z
- sea
- South Atlantic Ocean
- position
- -5.930, -34.849
- nearest port
- Natal · 23 nm
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-08-17 13:41Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. HAZARDOUS OPERATIONS 03 AUG THRU 11 SEP IN AREA BOUND BY 05-42.53S 034-45.02W, 06-09.83S 034-46.82W, 06-03.93S 034-57.22W, 05-47.03S 034-56.32W. 2. CANCEL THIS MSG 120001Z SEP 26.
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.
- 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
380 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.
- Hazardous operations 261300Z to 261900Z feb in area within ten miles of 05-40.00S 034-57.00W2024-02-22
- Hazardous operations 221300Z to 221900Z feb in area within five miles of 05-42.00S 035-01.00W2024-02-19
- Hazardous operations daily 1100Z to 2000Z 06 thru 08 dec in area bound by 05-51.89S 034-54.35W, 05-47.04S…2023-12-01
- Hazardous operations 051100Z to 051500Z dec in area within ten miles of 05-39.00S 034-52.00W2023-12-01
- Hazardous operations 021500Z to 022100Z oct in area within eight miles of 06-18.00S 034-40.00W2023-09-27
- Hazardous operations 291000Z to 291600Z sep in area within ten miles of 05-31.00S 034-53.00W2023-09-24
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
- Odas buoy established in 05-09.46S 035-09.81WNav aids · 50.1 nm
- Odas buoy bravo rn-l temporarily established until 20 oct in 04-53.00S 035-46.01WNav aids · 83.4 nm
Worldwide in the collected sources
28 military exercises listed in force · see all
Record snapshot 2026-10-01 05:09Z; 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.