Underwater operations in progress until 10 jun by submersible in vicinity of trackline joining 39-03.27N…
Mediterranean Sea - Western Basin · HYDROLANT 1530/18
What this record establishes
Archived notice · 2018-06-07 13:24Z
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 414/18 161159Z MAY 18.. Issued 2018-05-16 12:24Z. 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 - Western Basin. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROLANT 1530/18 and this msglater cancellation notice
Current notices and reporting history in the Mediterranean Sea - Western Basin →
- issued
- 2018-05-16 12:24Z
- status
- Archived notice
- authority
- NAVAREA III 414/18 161159Z MAY 18.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Western Basin
- position
- 38.231, 3.214
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN MEDITERRANEAN SEA. BALEARIC ISLANDS. ALGERIA. DNC 08. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 10 JUN BY SUBMERSIBLE IN VICINITY OF TRACKLINE JOINING 39-03.27N 002-59.08E, 37-08.42N 003-35.28E, 39-03.27N 002-59.08E, 39-01.52N 002-41.43E, 39-19.16N 002-34.93E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 11 JUN 18.
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.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- 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
47 within 180 nm since 2001 · 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 in progress until 111800Z apr by M/V tethys II in vicinity of trackline joining 40-07.0N…2023-04-09
- Survey operations 041400Z to 061400Z apr by M/V tethys 2 in area bound by 40-05.00N 006-16.70E, 39-31.20N…2023-04-03
- Survey operations 041700Z to 062359Z apr by M/V l'atalante in vicinity of trackline joining 40-46.00N…2023-04-03
- Survey operations in progress until 22 apr by M/V artabro in vicinity of trackline joining 39-53.10N…2023-03-27
- Survey operations 25 thru 27 mar by M/V l-atalant along trackline joining 40-11.00N 004-06.00E, 41-18.00N…2023-03-24
- Survey operations 10 thru 22 mar by M/V artabro in vicinity of trackline joining 39-53.10N 003-06.62E,…2023-03-09
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
- Cable operations by MV maasvliet (IMO-9996915) days 281200 UTC sep 26 until further notice in the segments:…Cable ops · 85.3 nm
- Hazardous operations 290001Z to 302359Z oct in area bound by 38-30.60N 000-30.80E, 38-35.50N 000-46.40E,…Exercises · 109.6 nm
- Drifting target shooting exercise from 290001 to 292359 UTC oct 26 or 300001 to 302359 UTC oct 26Other · 109.6 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-03 03:16Z; 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.