Hazardous operations 1631Z to 1830Z daily 06 thru 31 mar in area bound by 03-12N 000-54W, 02-56N 002-14E,…
Gulf of Guinea · HYDROLANT 712/18
What this record establishes
Archived notice · 2018-03-12 11:08Z
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) · FRENCH GUIANA 201051Z FEB 18.. Issued 2018-03-01 10:32Z. 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
- Gulf of Guinea. 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
- Cancel HYDROLANT 712/18 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Gulf of Guinea →
Activity windows · 26 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-03-06 16:31Z | 2018-03-06 18:30Z | — | 1 h 59 |
| 2018-03-07 16:31Z | 2018-03-07 18:30Z | — | 1 h 59 |
| 2018-03-08 16:31Z | 2018-03-08 18:30Z | — | 1 h 59 |
| 2018-03-09 16:31Z | 2018-03-09 18:30Z | — | 1 h 59 |
| 2018-03-10 16:31Z | 2018-03-10 18:30Z | — | 1 h 59 |
| 2018-03-11 16:31Z | 2018-03-11 18:30Z | — | 1 h 59 |
| 2018-03-12 16:31Z | 2018-03-12 18:30Z | — | 1 h 59 |
| 2018-03-13 16:31Z | 2018-03-13 18:30Z | — | 1 h 59 |
| … 18 more | |||
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-03-01 10:32Z
- status
- Archived notice
- self-cancels
- 2018-03-31 19:30Z
- authority
- FRENCH GUIANA 201051Z FEB 18.
- issued by
- FRENCH GUIANA
- sea
- Gulf of Guinea
- position
- 2.783, 0.645
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF GUINEA. DNC 01. 1. HAZARDOUS OPERATIONS 1631Z TO 1830Z DAILY 06 THRU 31 MAR IN AREA BOUND BY 03-12N 000-54W, 02-56N 002-14E, 02-22N 002-12E, 02-38N 000-57W. 2. CANCEL THIS MSG 311930Z MAR 18.
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.
- 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
10 within 180 nm since 1999 · 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 200001Z to 201800Z nov within 20 miles of 03-40N 001-40W1999-11-18
- Hazardous operations 230404Z to 230826Z jul within 30 miles of trackline joining 02-47N 177-05E, 04-08N…1999-07-22
- Hazardous operations 230404Z to 230826Z jul within 30 miles of trackline joining 02-47N 177-05E, 04-08N…1999-07-22
- Hazardous operations 220448Z to 220714Z jul, alternate 230444Z to 230710Z jul within 30 miles of trackline…1999-07-21
- Hazardous operations 220448Z to 220714Z jul, alternate 230444Z to 230710Z jul within 30 miles of trackline…1999-07-21
- Hazardous operations 220448Z to 220714Z jul, alternate 230444Z to 230710Z jul within 30 miles of trackline…1999-07-20
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
9 military exercises listed in force · see all
Record snapshot 2026-10-02 15:02Z; 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.