Survey operations in progress until 05 aug by M/V alliance towing equipment along trackline joining…
Mediterranean Sea - Western Basin · HYDROLANT 1466/09
What this record establishes
Archived notice · 2009-08-06 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 309/09 041040Z AUG 09.. Issued 2009-08-04 13:33Z. 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
Current notices and reporting history in the Mediterranean Sea - Western Basin →
- issued
- 2009-08-04 13:33Z
- status
- Archived notice
- authority
- NAVAREA III 309/09 041040Z AUG 09.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Western Basin
- position
- 38.034, 0.601
- vessel
- M/V ALLIANCE · 61 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. SURVEY OPERATIONS IN PROGRESS UNTIL 05 AUG BY M/V ALLIANCE TOWING EQUIPMENT ALONG TRACKLINE JOINING 39-56.16N 002-25.24E, 39-35.01N 002-15.23E, 39-04.03N 002-23.17E, 38-31.06N 002-04.97E, 37-53.18N 000-15.06E, 37-36.45N 000-01.50E, 37-24.47N 000-29.58W, 37-05.44N 001-19.13W, 36-22.47N 001-43.81W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 1428/09. 3. CANCEL THIS MSG 06 AUG.
Reading this warning
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Tow / towing
- A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
- 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.
- 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.
- 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
30 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.
- Survey operations in progress until 22 apr by M/V artabro in vicinity of trackline joining 39-53.10N…2023-03-27
- Survey operations 10 thru 22 mar by M/V artabro in vicinity of trackline joining 39-53.10N 003-06.62E,…2023-03-09
- Survey operations in progress until 182359Z dec by underwater glider in area bound by 39-13.6N 000-01.6E,…2021-09-17
- Survey operations in progress until 20 dec by M/V belkacem grine in area bound by 36-19-44N 001-28-49W,…2020-11-26
- Survey operations in progress until 010001Z oct by underwater glider along trackline joining 39-30.0N…2020-07-30
- Underwater operations in progress until 13 jul by submersible SDEEP01 in vicinity of trackline joining…2018-05-30
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
Worldwide in the collected sources
50 survey operations listed in force · see all
Record snapshot 2026-09-24 23:07Z; 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.