Hazardous operations in progress until further notice in area within 500 meters of 53-18.3N 001-23.2E
North Sea · HYDROLANT 1023/21
What this record establishes
Archived notice · 2021-04-16 14:10Z
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 I 46/21 141910Z APR 21.. Issued 2021-04-14 19:10Z. 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 parsed report position is 53.305, 1.387 with a 0.3 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
- issued
- 2021-04-14 19:10Z
- status
- Archived notice
- authority
- NAVAREA I 46/21 141910Z APR 21.
- NAVAREA
- NAVAREA I · named as the source of this relay
- sea
- North Sea
- position
- 53.305, 1.387 · r 0.3 nm
- 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. HAZARDOUS OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE IN AREA WITHIN 500 METERS OF 53-18.3N 001-23.2E.
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.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
Collected reports in this area · military exercises
21 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 0800Z to 1000Z and 1330Z to 1530Z daily 04 and 05 aug in area bound by 55-50N 001-18W,…2021-08-04
- 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 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
28 military exercises listed in force · see all
Record snapshot 2026-10-02 11:11Z; 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.