Underwater operations in progress until 30 jan 22 in area bound by 33-37N 031-22E, 33-37N 032-11E, 33-17N…
Mediterranean Sea - Eastern Basin · HYDROLANT 2851/21
What this record establishes
Archived notice · 2021-12-21 15:51Z
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 834/21 200002Z NOV 21.. Issued 2021-11-20 00:08Z. 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 map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROLANT 2851/21, 3037/21(36), and this msglater cancellation notice
Current notices and reporting history in the Mediterranean Sea - Eastern Basin →
- issued
- 2021-11-20 00:08Z
- status
- Archived notice
- authority
- NAVAREA III 834/21 200002Z NOV 21.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Eastern Basin
- position
- 33.450, 31.775
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN MEDITERRANEAN SEA. CYPRUS-SOUTHWEST COAST. DNC 10. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 30 JAN 22 IN AREA BOUND BY 33-37N 031-22E, 33-37N 032-11E, 33-17N 032-11E, 33-17N 031-22E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 31 JAN 22.
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.
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
227 within 180 nm since 2000 · 2 in the last 12 months · 1 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.
- Scientific research and underwater operations by vessels r/v harvest chief, denar pathfinder, denar echo and…2026-10-01
- Underwater operations 01 thru 25 oct by M/V oruc reis, M/V denar echo, M/V kirici and M/V denar pathfinder…2026-09-30
- Survey operations 270001Z dec until further notice by M/V ramform titan in area bound by 33-38.90N…2023-12-25
- Survey operations 14 oct until further notice by M/V ramform hyperion towing 12 11112 meter long cables in…2023-10-13
- Survey operations in progress until further notice by M/V ramform titan towing 12 six mile long cables in…2023-09-01
- Survey operations in progress until further notice by M/V ramform titan towing 12 six mile long cables in…2023-08-31
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
- Odas buoy 33-33.41N 031-55.09E reported missingNav aids · 9.6 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-01 15:09Z; 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.