Hazardous operations
North Atlantic Ocean · HYDROLANT 2117/16
What this record establishes
Archived notice · 2016-08-24 23:12Z
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) · MARINE GUYANE ARIANE VA 232 191746Z JUL 16.. Issued 2016-08-19 08:09Z. 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
- North 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
- Hazardous operationslater cancellation notice
Current notices and reporting history in the North Atlantic Ocean →
Activity windows · 64 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2016-08-24 20:50Z | 2016-08-24 23:40Z | — | 2 h 50 |
| 2016-08-24 21:48Z | 2016-08-25 00:24Z | — | 2 h 36 |
| 2016-08-25 20:50Z | 2016-08-25 23:40Z | — | 2 h 50 |
| 2016-08-25 21:48Z | 2016-08-26 00:24Z | — | 2 h 36 |
| 2016-08-26 20:50Z | 2016-08-26 23:40Z | — | 2 h 50 |
| 2016-08-26 21:48Z | 2016-08-27 00:24Z | — | 2 h 36 |
| 2016-08-27 20:50Z | 2016-08-27 23:40Z | — | 2 h 50 |
| 2016-08-27 21:48Z | 2016-08-28 00:24Z | — | 2 h 36 |
| … 56 more | |||
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2016-08-19 08:09Z
- status
- Archived notice
- self-cancels
- 2016-09-25 01:24Z
- authority
- MARINE GUYANE ARIANE VA 232 191746Z JUL 16.
- issued by
- COMAR GUYANE
- sea
- North Atlantic Ocean
- position
- 1.470, -10.729
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BRAZIL-NORTH COAST.
EASTERN NORTH ATLANTIC.
HAZARDOUS OPERATIONS.
DNC 01.
1. HAZARDOUS OPERATIONS:
A. 2050Z TO 2340Z DAILY 24 AUG THRU 24 SEP
IN AREA BOUND BY
05-17N 047-28W, 04-45N 047-29W,
04-48N 048-28W, 05-19N 048-26W.
B. 2050Z TO 2340Z DAILY 24 AUG THRU 24 SEP
IN AREA BOUND BY
05-01N 045-33W, 04-44N 045-34W,
04-50N 047-18W, 05-07N 047-17W.
C. 2148Z TO 0024Z COMMENCING DAILY
24 AUG THRU 24 SEP IN AREA BOUND BY
01-22N 001-41W, 00-25S 001-54W,
01-19N 017-06W, 03-06N 016-54W.
2. CANCEL THIS MSG 250124Z SEP 16.
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.
- 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.
- 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
22 within 180 nm since 2006 · 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: a. 2025Z to 0005Z commencing daily 14 feb thru 14 mar in area bound by 05-16N 047-26W,…2017-02-09
- Hazardous operations2010-10-22
- Hazardous operations2010-06-19
- Hazardous operations 1500Z to 2325Z daily 29 oct thru 29 nov in area bound by 01-16N 000-51W, 00-32S…2009-10-24
- Hazardous operations 2000Z to 0103Z commencing daily 30 sep thru 30 oct in area bound by 00-41N 000-43W,…2009-09-24
- Hazardous operations 2000Z to 0146Z commencing daily 20 aug thru 20 sep in area bound by 00-59N 001-56W,…2009-08-15
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
10 military exercises listed in force · see all
Record snapshot 2026-10-03 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.