Hazardous operations
North Atlantic Ocean · HYDROLANT 613/11
What this record establishes
Archived notice · 2011-04-16 09:14Z
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 92/11 130951Z APR 11.. Issued 2011-04-13 10:25Z. 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 parsed report position is 57.033, -9.123 with a 60.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Current notices and reporting history in the North Atlantic Ocean →
Activity windows · 6 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2011-04-14 10:00Z | 2011-04-14 20:00Z | — | 10 h |
| 2011-04-15 10:00Z | 2011-04-15 20:00Z | — | 10 h |
| 2011-04-16 10:00Z | 2011-04-16 20:00Z | — | 10 h |
| 2011-04-17 10:00Z | 2011-04-17 20:00Z | — | 10 h |
| 2011-04-18 10:00Z | 2011-04-18 20:00Z | — | 10 h |
| 2011-04-19 10:00Z | 2011-04-19 20:00Z | — | 10 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2011-04-13 10:25Z
- status
- Archived notice
- self-cancels
- 2011-04-19 21:00Z
- authority
- NAVAREA I 92/11 130951Z APR 11.
- NAVAREA
- NAVAREA I · named as the source of this relay
- sea
- North Atlantic Ocean
- position
- 57.033, -9.123 · r 60.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH ATLANTIC. SCOTLAND-WEST COAST. HAZARDOUS OPERATIONS. 1. HAZARDOUS OPERATIONS 1000Z TO 2000Z DAILY 14 THRU 19 APR WITHIN 60 MILES OF 57-02.0N 009-07.4W. VESSELS INTENDING TO ENTER AREA SHOULD CONTACT HEBRIDES RANGE CONTROL ON VHF CH 16 FOR ADVICE. 2. CANCEL THIS MSG 192100Z APR.
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.
- 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.
- VHF / channel 16
- Very high frequency marine radio; channel 16 is the international distress, safety and calling channel.
- 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
348 within 180 nm since 2001 · 8 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 0700Z to 1600Z daily 05 thru 10 oct in areas within: a. 27 miles of 57-27.50N 008-20.50W2026-10-01
- Hazardous operations 0700Z to 1630Z daily 25 thru 26 sep and 28 sep thru 03 oct in areas within: a. 27 miles…2026-09-21
- Hazardous operations 180600Z to 181700Z sep in areas within: a. 27 miles of 57-27.50N 008-20.50W2026-09-16
- Hazardous operations 160600Z to 161700Z sep in areas within: a. 27 miles of 57-27.50N 008-20.50W2026-09-14
- Hazardous operations 0900Z to 2330Z daily 17 thru 21 sep in area within 140 miles of 58-14.00N 013-21.00W2026-09-12
- Hazardous operations 0800Z to 1800Z daily 04 thru 05 and 07 thru 12 sep in areas within: a. 27 miles of…2026-09-01
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 09:08Z; 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.