Underwater operations in progress until further notice in vicinity 35-55.37N 011-33.70E
Mediterranean Sea - Eastern Basin · HYDROLANT 2150/21
What this record establishes
Archived notice · 2022-03-15 12:18Z
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 III 645/21 191303Z AUG 21.. Issued 2021-08-20 12:28Z. 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
- Mediterranean Sea - Eastern Basin. The parsed report position is 35.923, 11.562. 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
- Navigation prohibited in area within two miles of 35-55.37N 011-33.70E due to production in oil fieldcancelled by this notice
- Cancel HYDROLANT 1885/21, 2150/21, 2625/21, 57/22, 610/22 and this msglater cancellation notice
Current notices and reporting history in the Mediterranean Sea - Eastern Basin →
- issued
- 2021-08-20 12:28Z
- status
- Archived notice
- authority
- NAVAREA III 645/21 191303Z AUG 21.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Eastern Basin
- position
- 35.923, 11.562
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN MEDITERRANEAN SEA. TUNISIA. DNC 08. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE IN VICINITY 35-55.37N 011-33.70E. TWO MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 2136/21.
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.
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
Collected reports in this area · survey operations
257 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.
- Survey operations 10 apr thru 10 may by M/V dalla porta in: a. 37-23.06N 011-35.59E2022-04-08
- Survey operations 13 thru 21 feb by M/V havila phoenix with submersible along trackline joining 35-56.56N…2022-02-11
- Survey operations in progress until 12 mar 22 by M/V artabro in area bound by 36-46.3N 011-01.8E, 37-01.5N…2021-10-30
- Survey operations in progress until 12 mar 22 by M/V viccica in area bound by 36-48.5N 011-02.9E, 36-46.8N…2021-10-30
- Survey operations in progress until 01 nov by M/V artabro in area bound by 36-47.4N 011-04.3E, 37-14.2N…2021-10-25
- Underwater operations 22 sep thru 16 oct by M/V dalla porta in area bound by 37-34N 011-14E, 37-23N 011-36E,…2021-09-20
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
50 survey operations listed in force · see all
Record snapshot 2026-09-25 00:48Z; 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.