Underwater operations in progress until further notice by M/V seawell with submersible in 53-55.5N 000-37.5E
North Sea · HYDROLANT 2520/10
What this record establishes
Archived notice · 2011-01-09 10:20Z
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 1547/10 281645Z DEC 10.. Issued 2010-12-28 17:37Z. 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 53.925, 0.625. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROLANT 2520/10, operations completedlater cancellation notice
- issued
- 2010-12-28 17:37Z
- status
- Archived notice
- authority
- WZ 1547/10 281645Z DEC 10.
- issued by
- WZ
- sea
- North Sea
- position
- 53.925, 0.625
- vessel
- M/V SEAWELL
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
ENGLAND-EAST COAST. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V SEAWELL WITH SUBMERSIBLE IN 53-55.5N 000-37.5E.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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 · survey operations
551 within 180 nm since 1997 · 1 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.
- Underwater operations in progress until further notice by M/V zwerver I in area bound by 53-34.50N…2026-09-14
- Survey operations in progress until 25 may by M/V ramform tethys towing 12 8000 meter long cables in area…2024-04-22
- Survey operations in progress until further notice by M/V sw amundsen towing seven 2200 meter long cables in…2024-04-18
- Survey operations in progress until further notice by M/V sw bly towing 12 5000 meter long cables in area…2022-09-04
- Survey operations in progress until further notice by M/V sw bly towing 12 5000 meter long cables in area…2022-08-28
- Survey operations in progress until further notice by M/V sw bly towing 12 5000 meter long cables in area…2022-08-27
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
56 survey operations listed in force · see all
Record snapshot 2026-10-03 02:50Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.