Underwater operations 04 thru 19 apr by M/V squalo in area bound by 41-26N 012-27E, 41-24N 012-41E, 41-20N…
Tyrrhenian Sea · HYDROLANT 765/02
What this record establishes
Archived notice · 2002-04-20 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) · MARDIPART TARANTO 238/02 030923B APR 02. Issued 2002-04-03 18:06Z. 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.
Current notices and reporting history in the Tyrrhenian Sea →
- issued
- 2002-04-03 18:06Z
- status
- Archived notice
- authority
- MARDIPART TARANTO 238/02 030923B APR 02
- issued by
- MARDIPART TARANTO
- sea
- Tyrrhenian Sea
- position
- 41.345, 12.685
- vessel
- M/V SQUALO
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS 04 THRU 19 APR BY M/V SQUALO IN AREA BOUND BY 41-26N 012-27E, 41-24N 012-41E, 41-20N 012-55E, 41-15N 012-49E, 41-19N 012-35E, 41-25N 012-26E, 41-26N 012-27E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 20 APR.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- 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.
- 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
93 within 180 nm since 1997 · 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 28 aug thru 05 sep by M/V dalla porta in area bound by 43-28.78N 007-43.51E, 42-11.06N…2021-08-26
- Survey operations 15 may thru 30 sep by M/V astrea in: a. 43-51-01N 008-16-52E2021-05-12
- Survey operations 02 may thru 15 jun along trackline joining 40-50-28N 012-52-58E, 40-52-59N 012-18-44E,…2021-05-01
- Survey operations 01 feb thru 30 apr by M/V latlante in: a. along trackline joining 39-13.67N 010-40.94E,…2021-01-31
- Survey operations 12 thru 18 oct by M/V dalla along tracklines joining: a. 41-19.18N 009-18.43E, 41-16.41N…2020-10-13
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 06:44Z; 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.