Hazardous operations 0830Z to 2030Z daily 18 thru 27 sep: a. in area bound by 05-42.53S 034-45.02W,…
South Atlantic Ocean · HYDROLANT 2872/17
What this record establishes
Archived notice · 2017-09-15 18:28Z
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 E 749/17 151647Z SEP 17.. Issued 2017-09-15 17:13Z. 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 · 10 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2017-09-18 08:30Z | 2017-09-18 20:30Z | — | 12 h |
| 2017-09-19 08:30Z | 2017-09-19 20:30Z | — | 12 h |
| 2017-09-20 08:30Z | 2017-09-20 20:30Z | — | 12 h |
| 2017-09-21 08:30Z | 2017-09-21 20:30Z | — | 12 h |
| 2017-09-22 08:30Z | 2017-09-22 20:30Z | — | 12 h |
| 2017-09-23 08:30Z | 2017-09-23 20:30Z | — | 12 h |
| 2017-09-24 08:30Z | 2017-09-24 20:30Z | — | 12 h |
| 2017-09-25 08:30Z | 2017-09-25 20:30Z | — | 12 h |
| … 2 more | |||
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2017-09-15 17:13Z
- status
- Archived notice
- self-cancels
- 2017-09-27 21:30Z
- authority
- NAVAREA V COASTAL E 749/17 151647Z SEP 17.
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V COASTAL E
- sea
- South Atlantic Ocean
- position
- -5.909, -34.968
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC.
BRAZIL-NORTHEAST COAST.
DNC 01.
1. HAZARDOUS OPERATIONS 0830Z TO 2030Z DAILY
18 THRU 27 SEP:
A. 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.
B. WITHIN 20 MILES OF 05-54.53S 034-14.92W.
C. WITHIN 32 MILES OF 05-54.53S 035-14.92W.
2. CANCEL HYDROLANT 2856/17.
3. CANCEL THIS MSG 272130Z SEP 17.
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.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
- 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
381 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 03 aug thru 11 sep in area bound by 05-42.53S 034-45.02W, 06-09.83S 034-46.82W,…2026-07-29
- 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
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 · 46.6 nm
- Odas buoy bravo rn-l temporarily established until 20 oct in 04-53.00S 035-46.01WNav aids · 77.9 nm
Worldwide in the collected sources
9 military exercises listed in force · see all
Record snapshot 2026-10-03 17:14Z; 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.