Hazardous operations 0800Z to 1000Z and 1330Z to 1530Z daily 04 and 05 aug in area bound by 55-50N 001-18W,…
North Sea · HYDROLANT 2026/21
What this record establishes
Archived notice · 2021-08-05 16:30Z
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) · WZ 830/21 040334Z AUG 21.. Issued 2021-08-04 03:38Z. 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 Sea. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
- issued
- 2021-08-04 03:38Z
- status
- Archived notice
- self-cancels
- 2021-08-05 16:30Z
- authority
- WZ 830/21 040334Z AUG 21.
- issued by
- WZ
- sea
- North Sea
- position
- 55.483, -0.530
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH SEA. ENGLAND. DNC 20. 1. HAZARDOUS OPERATIONS 0800Z TO 1000Z AND 1330Z TO 1530Z DAILY 04 AND 05 AUG IN AREA BOUND BY 55-50N 001-18W, 55-50N 000-05E, 55-20N 000-17E, 55-02N 000-40W, 55-02N 001-00W. 2. CANCEL THIS MSG 051630Z AUG 21.
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
30 within 180 nm since 2005 · 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 1000Z to 1100Z and 1500Z to 1600Z daily 22 thru 24, 30 and 31 and 251000Z to 251100Z…2023-08-18
- Hazardous operations 161100Z to 161200Z sep in area bound by 55-44N 001-16W, 55-44N 000-07E, 55-20N 000-17E,…2021-09-16
- Hazardous operations in progress until 141800Z jul in area within ten miles of 54-07.2N 000-23.9E2021-07-14
- Hazardous operations 141200Z to 141600Z jul in area within ten miles of 54-07.2N 000-23.9E2021-07-14
- Hazardous operations in progress until further notice in area within 500 meters of 53-18.3N 001-23.2E2021-04-14
- Hazardous operations 180600Z to 181000Z oct in area bound by 55-44.0N 001-15.9W, 55-44.0N 000-07.5E,…2017-10-17
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 16:35Z; 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.