Hazardous operations
South Atlantic Ocean · HYDROLANT 960/10
What this record establishes
Archived notice · 2010-06-02 17:00Z
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 S 855/10 270033Z MAY 10 - WZ 592/10 270115Z MAY 10 - WZ 596/10 270115Z MAY 10 - WZ 598/10 270115Z MAY 10. Issued 2010-05-27 01:31Z. 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
- Nga chart 37057 (2ND ed)cancelled by this notice
- Underwater operations in progress until further notice by cableship leon thevenin along trackline between…cancelled by this notice
- Nga chart 37120 (3RD ed)cancelled by this notice
Current notices and reporting history in the South Atlantic Ocean →
Activity windows · 2 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2010-05-31 22:00Z | 2010-06-01 01:00Z | — | 3 h |
| 2010-06-02 10:00Z | 2010-06-02 16:00Z | — | 6 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2010-05-27 01:31Z
- status
- Archived notice
- self-cancels
- 2010-06-02 17:00Z
- authority
- NAVAREA V S 855/10 270033Z MAY 10 - WZ 592/10 270115Z MAY 10 - WZ 596/10 270115Z MAY 10 - WZ 598/10 270115Z MAY 10
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V S
- sea
- South Atlantic Ocean
- position
- -33.547, -50.162
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BRAZIL-SOUTH COAST. HAZARDOUS OPERATIONS. 1. HAZARDOUS OPERATIONS 312200Z MAY TO 010100Z JUN AND 021000Z TO 021600Z JUN IN AREA BOUND BY 33-10S 050-37W, 33-10S 049-35W, 33-25S 049-35W, 34-00S 050-00W, 34-00S 050-37W. 2. CANCEL HYDROLANT 857/10(37), 931/10(35), 940/10(37). 3. CANCEL THIS MSG 021700Z JUN.
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
95 within 180 nm since 2000 · 3 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 050800Z to 092200Z oct in area bound by 30-15.00S 049-54.50W, 30-15.00S 050-06.75W,…2026-09-30
- 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
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
28 military exercises listed in force · see all
Record snapshot 2026-10-02 06:08Z; 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.