Underwater research operations 09 thru 28 feb by M/V alliance: a. along trackline between 42-48.65N…
Tyrrhenian Sea · HYDROLANT 329/02
What this record establishes
Archived notice · 2002-02-09 13:20Z
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) · MARIDIPART LA SPEZIA 59/02 081055Z FEB 02. Issued 2002-02-08 17:50Z. 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
- Tyrrhenian Sea. The parsed report position is 42.805, 10.255. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Underwater research operations 04, 06, 08, 09 thru 11, 14 thru 19 and 22 thru 25 feb by M/V alliance in area…cancelled by this notice
- Cancel HYDROLANT 329/02 and this msglater cancellation notice
Current notices and reporting history in the Tyrrhenian Sea →
- issued
- 2002-02-08 17:50Z
- status
- Archived notice
- authority
- MARIDIPART LA SPEZIA 59/02 081055Z FEB 02
- issued by
- MARIDIPART LA SPEZIA
- sea
- Tyrrhenian Sea
- position
- 42.805, 10.255
- 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. UNDERWATER RESEARCH OPERATIONS 09 THRU 28 FEB BY
M/V ALLIANCE:
A. ALONG TRACKLINE BETWEEN 42-48.65N 010-15.75E
AND 42-47.90N 010-14.90E.
B. VICINITY STELLA GULF (42-44.0N 010-21.0E).
2. CANCEL HYDROLANT 252/02.
3. CANCEL THIS MSG 01 MAR.
Reading this warning
- 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.
- 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
197 within 180 nm since 1998 · 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 22 jul thru 13 aug by M/V tethys II, M/V l`europe, and M/V sagitta III in area bound by…2023-07-20
- Survey operations in progress until 19 jul by M/V five in area bound by 43-49.26N 009-54.46E, 44-09.71N…2023-07-18
- Survey operations in progress until 30 mar by M/V ocean link along trackling joining 43-14.09N 007-46.66E,…2023-03-17
- Survey operations 02 thru 17 feb by M/V tethys II, M/V l europe and M/V sagitta III in area bound by…2023-01-30
- Survey operations 20 aug thru 17 sep by M/V dallaporta in area bound by 40-38.53N 010-05.00E, 41-20.54N…2022-08-18
- Survey operations 07 thru 15 jul by M/V thetys II, M/V l'europe and M/V saggitta III in area bound by…2022-07-05
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
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.