Underwater operations in progress until 13 jul by submersible SDEEP01 in vicinity of trackline joining…
Mediterranean Sea - Western Basin · HYDROLANT 1697/18
What this record establishes
Archived notice · 2018-07-14 00:01Z
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 451/18 301202Z MAY 18.. Issued 2018-05-30 12:12Z. 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.
Current notices and reporting history in the Mediterranean Sea - Western Basin →
- issued
- 2018-05-30 12:12Z
- status
- Archived notice
- authority
- NAVAREA III 451/18 301202Z MAY 18.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Western Basin
- position
- 36.512, -1.826
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN MEDITERRANEAN SEA. ALBORAN SEA. SPAIN. DNC 08. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 13 JUL BY SUBMERSIBLE SDEEP01 IN VICINITY OF TRACKLINE JOINING 36-46.04N 001-06.02W, 36-54.26N 001-14.06W, 36-35.25N 001-46.75W, 36-35.25N 002-12.79W, 36-07.32N 002-12.79W, 36-07.32N 001-46.75W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 14 JUL 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
28 within 180 nm since 2000 · 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.
- Underwater operations by M/V rebecca in vicinity of trackline joining: a. in progress until 27 dec 36-17.61N…2019-12-23
- Underwater operations in progress until 062359Z dec in areas within two miles of: a. 36-41.0N 004-16.5W2019-12-02
- Underwater operations in progress until 30 dec by M/V stril explorer and M/V plastic beam along trackline…2019-12-02
- Survey operations 1000Z to 1600Z daily 20 thru 24 may in area bound by 35-37N 005-15W, 35-35N 005-05W,…2019-05-20
- Survey operations in progress until 04 apr by M/V pourquoi pas in vicinity of trackline joining 36-02.71N…2019-04-02
- Survey operations in progress until 31 mar by M/V pourquoi pas in vicinity of trackline joining 36-00.47N…2019-03-29
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 04:35Z; 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.