Survey operations in progress until 24 sep by M/V thetis towing equipment in areas bound by: a. 37-34.3N…
Mediterranean Sea - Eastern Basin · HYDROLANT 3267/00
What this record establishes
Archived notice · 2000-09-25 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 392/00 220815Z SEP 00; NAVAREA II 272/00 221120Z SEP 00; WZ 1826/00 221127Z SEP 00. Issued 2000-09-22 11:50Z. 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
- Underwater operations in progress until further notice: a. within two miles of 47-14.38N 004-22.35Wcancelled by this notice
- Salvage operations in progress until further notice vicinity 50-17.6N 002-07.6Wcancelled by this notice
Current notices and reporting history in the Mediterranean Sea - Eastern Basin →
- issued
- 2000-09-22 11:50Z
- status
- Archived notice
- authority
- NAVAREA III 392/00 220815Z SEP 00; NAVAREA II 272/00 221120Z SEP 00; WZ 1826/00 221127Z SEP 00
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Eastern Basin
- position
- 37.000, 13.854
- vessel
- M/V THETIS · 20 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 24 SEP BY
M/V THETIS TOWING EQUIPMENT IN AREAS BOUND BY:
A. 37-34.3N 012-36.0E, 37-18.0N 012-27.3E,
36-02.0N 015-09.3E, 36-42.0N 015-40.2E.
B. 35-46.0N 012-15.0E, 35-26.0N 013-08.0E,
35-02.0N 012-50.0E, 35-25.0N 012-00.0E.
2. CANCEL HYDROLANT 2615/00(37), OPERATIONS COMPLETED.
3. CANCEL HYDROLANT 3142/00(37), OPERATIONS SUSPENDED.
4. CANCEL THIS MSG 25 SEP.
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.
- 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.
- 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
308 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 by M/V handin tide with submersible: a. 01 thru 05 jun in area within ten miles of…2022-05-27
- 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
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-03 08:02Z; 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.