Hazardous operations 280800Z sep to 122200Z oct in area bound by 29-30.53S 049-05.53W, 29-27.03S 049-32.03W,…
South Atlantic Ocean · HYDROLANT 1905/26
What this record establishes
Cancelled notice · 2026-09-28 16:45Z
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 2026-09-26 00:53Z. First collected 2026-09-28 19:32Z; last seen in collection 2026-09-28 22:32Z. 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 · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2026-09-28 08:00Z | 2026-10-12 22:00Z | — | 350 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2026-09-26 00:53Z
- status
- Cancelled notice
- self-cancels
- 2026-10-12 23:00Z
- sea
- South Atlantic Ocean
- position
- -30.317, -49.811
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-28 19:32Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. HAZARDOUS OPERATIONS 280800Z SEP TO 122200Z OCT IN AREA BOUND BY 29-30.53S 049-05.53W, 29-27.03S 049-32.03W, 30-38.03S 050-09.53W, 31-06.53S 050-29.53W, 31-24.03S 050-19.53W 2. CANCEL HYDROLANT 1892/26. 3. CANCEL THIS MSG 122300Z OCT 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.
- 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.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · military exercises
175 within 180 nm since 2003 · 4 in the last 12 months · 1 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 280800Z sep to 122200Z oct in area bound by 29-27.03S 049-32.03W, 29-30.53S 049-05.53W,…2026-09-25
- Hazardous operations 280900Z sep to 022100Z oct in area bound by 30-15.00S 050-06.75W, 30-15.00S 049-54.50W,…2026-09-25
- Hazardous operations 230800Z to 252130Z sep in area bound by 30-15.00S 049-54.50W, 30-15.00S 050-06.75W,…2026-09-18
- Hazardous operations 290300Z to 292100Z sep in area bound by 32-22.40S 052-12.40W, 32-30.40S 052-14.10W,…2023-09-24
- Hazardous operations 220900Z to 250400Z aug in area bound by 31-28.42S 049-14.03W, 31-13.60S 049-44.45W,…2023-08-17
- Hazardous operations 110900Z to 120400Z in area bound by 31-28.42S 049-14.02W, 31-13.60S 049-44.45W,…2023-08-06
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
Worldwide in the collected sources
31 military exercises listed in force · see all
Record snapshot 2026-09-28 22:33Z; 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.