Underwater operations in progress until further notice by M/V neftegaz 31 vicinity of trackline between…
Celtic Sea · HYDROLANT 1735/01
What this record establishes
Archived notice · 2001-06-16 21:30Z
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) · WZ 1292/01 151322Z JUN 01; WZ 1291/01 151244Z JUN 01; NAVAREA II 240/01 151230Z JUN 01; WZ 1289/01 150827Z JUN 01. Issued 2001-06-15 14:35Z. 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
- Celtic Sea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Underwater operations in progress until further notice by cableship maersk forwarder vicinity of trackline…cancelled by this notice
- Underwater operations in progress until further notice by M/V pasvik vicinity of trackline between 47-32N…cancelled by this notice
- Underwater operations in progress until further notice by M/V havila reel within one mile of 51-22.5N…cancelled by this notice
- Underwater operations in progress until further notice by M/V neftegaz 31 vicinity of trackline between…later cancellation notice
- issued
- 2001-06-15 14:35Z
- status
- Archived notice
- authority
- WZ 1292/01 151322Z JUN 01; WZ 1291/01 151244Z JUN 01; NAVAREA II 240/01 151230Z JUN 01; WZ 1289/01 150827Z JUN 01
- NAVAREA
- NAVAREA II · named as the source of this relay
- issued by
- WZ
- sea
- Celtic Sea
- position
- 50.958, -5.183
- vessel
- M/V NEFTEGAZ 31 · 64 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V NEFTEGAZ 31 VICINITY OF TRACKLINE BETWEEN 50-53N 004-55W AND 51-02N 005-27W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 1698/01, OPERATIONS COMPLETED. 3. CANCEL HYDROLANT 1721/01 AND 1724/01, OPERATIONS SUSPENDED.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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.
- 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.
Collected reports in this area · survey operations
745 within 180 nm since 1999 · 1 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 zwerver I in area bound by 53-34.50N…2026-09-14
- Survey operations in progress until 31 oct by M/V ramform vanguard towing cables in area bound by 53-44.12N…2024-09-26
- Underwater operations 180800Z to 192200Z nov by M/V willchallenge in vicinity of 50-19.0N 004-14.7W2022-11-17
- Survey operations 15 sept thru 20 oct by M/V thlassa in vicinity of trackline joining 48-30.00N 006-00.00W,…2022-09-14
- Survey operations in progress until 10 sep by M/V laperouse and M/V borda along trackline joining 48-27.48N…2022-09-01
- Underwater operations in progress until further notice by unmanned submersible ALR4 in vicinity of trackline…2022-06-10
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
54 survey operations listed in force · see all
Record snapshot 2026-10-02 11:52Z; 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.