Survey operations in progress until 10 jul by M/V medma in areas bound by: a. 38-00.5N 012-19.4E, 38-00.5N…
Tyrrhenian Sea · HYDROLANT 1967/00
What this record establishes
Archived notice · 2000-07-11 00:00Z
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 249/00 311208Z MAY 00; WZ 1036/00 311144Z MAY 00; WZ 311239Z MAY 00. Issued 2000-05-31 13:19Z. 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
- Tyrrhenian Sea. 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
- Glas eilean light 57-43N 005-42W unlitcancelled by this notice
- Underwater operations in progress until further notice by M/V pasvik vicinity of trackline between 49-55N…cancelled by this notice
Current notices and reporting history in the Tyrrhenian Sea →
- issued
- 2000-05-31 13:19Z
- status
- Archived notice
- authority
- NAVAREA III 249/00 311208Z MAY 00; WZ 1036/00 311144Z MAY 00; WZ 311239Z MAY 00
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Tyrrhenian Sea
- position
- 37.974, 12.356
- vessel
- M/V MEDMA · 5 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 10 JUL BY M/V MEDMA
IN AREAS BOUND BY:
A. 38-00.5N 012-19.4E, 38-00.5N 012-16.3E, 38-04.0N 012-16.3E,
38-04.0N 012-23.6E, 38-00.5N 012-23.6E, 38-00.5N 012-20.6E,
COASTLINE.
B. 37-56.8N 012-16.8E, 37-59.4N 012-16.8E, 37-59.4N 012-22.2E,
37-55.4N 012-22.2E, COASTLINE.
C. 37-55.6N 012-22.2E, 37-55.6N 012-28.4E, 37-52.0N 012-26.5E,
37-52.0N 012-22.2E.
WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 378/00(35), AID RESTORED.
3. CANCEL HYDROLANT 1949/00(36), OPERATIONS COMPLETED.
4. CANCEL THIS MSG 11 JUL.
Reading this warning
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- 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.
- 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
301 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.
- Underwater operations in progress until further notice by M/V joides resolution in: a. 40-11.03N 012-42.49E2024-02-16
- 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
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
55 survey operations listed in force · see all
Record snapshot 2026-10-02 09:38Z; 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.