Underwater survey operations in progress until further notice by M/V western patriot towing 3000 meter long…
Adriatic Sea · HYDROLANT 2035/97
What this record establishes
Archived notice · 1999-03-12 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). Issued 1997-12-25 15:32Z. 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
- Adriatic 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.
- issued
- 1997-12-25 15:32Z
- status
- Archived notice
- sea
- Adriatic Sea
- position
- 42.486, 15.137
- vessel
- M/V WESTERN PATRIOT · 240 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
UNDERWATER SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V WESTERN PATRIOT TOWING 3000 METER LONG CABLE WITH TAILBUOY IN AREA BOUND BY 42-44N 015-10E, 42-32N 015-30E, 42-14N 014-57E, 42-24N 014-50E. WIDE BERTH REQUESTED.
Reading this warning
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- Towed array / streamer
- Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
Collected reports in this area · survey operations
81 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.
- Survey operations 07 nov thru 31 dec by M/V polar empress towing one five mile long cable in area bound by…2018-11-02
- Underwater operations 04 thru 31 oct within 500 meters of 44-40.27N 013-12.48E2015-10-03
- Underwater operations in progress until 202359Z dec by M/V northern explorer in area bound by 44-40.5N…2013-12-16
- Underwater operations in progress until further notice by M/V northern explorer in area bound by 44-44N…2013-12-11
- Underwater operations in progress until further notice by M/V northern explorer along trackline joining…2013-12-06
- Underwater operations in progress until further notice by M/V northern explorer along trackline joining…2013-12-04
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
56 survey operations listed in force · see all
Record snapshot 2026-10-03 22:46Z; 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.