Underwater operations in progress until further notice by M/V neftegaz 31 vicinity of trackline between…
Celtic Sea · HYDROLANT 2177/01
What this record establishes
Archived notice · 2001-08-06 21:05Z
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 1662/01 061301Z AUG 01; NAVAREA II 290/01 060721Z AUG 01; WZ 1661/01 061209Z AUG 01. Issued 2001-08-06 16:26Z. 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 cable operations in progress until further notice by cableship nexus along trackline joining…cancelled by this notice
- Underwater operations in progress until further notice by M/V neftegaz 31 vicinity of trackline between…cancelled by this notice
- Underwater operations in progress until further notice by M/V goosander vicinity of trackline between 50-27N…cancelled by this notice
- Underwater operations in progress until further notice by M/V neftegaz 31 vicinity of trackline between…later cancellation notice
- issued
- 2001-08-06 16:26Z
- status
- Archived notice
- authority
- WZ 1662/01 061301Z AUG 01; NAVAREA II 290/01 060721Z AUG 01; WZ 1661/01 061209Z AUG 01
- NAVAREA
- NAVAREA II · named as the source of this relay
- issued by
- WZ
- sea
- Celtic Sea
- position
- 49.083, -6.058
- 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 49-05N 006-18W AND 49-05N 005-49W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 2156/01(57) AND 2174/01, OPERATIONS COMPLETED. 3. CANCEL HYDROLANT 2171/01.
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
804 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.
- Scientific mooring established in 47-35.83N 007-23.92W2024-07-23
- Underwater operations 02 thru 11 oct by M/V atalante in area bound by 47-26.59N 006-34.33W, 46-52.40N…2023-09-29
- Survey operations in progress until 060001Z oct by M/V pourquoi pas in area bound by 47-17.05N 009-17.05W,…2023-09-25
- Survey operations 072201Z to 112159Z jun by vessel nanoplon in area within one mile of 48-20.67N 008-22.08W2023-06-06
- Survey operations 19 thru 25 apr in area bound by 48-00.00N 009-29.00W, 48-00.00N 007-56.00W, 46-54.00N…2023-04-17
- Scientific mooring established in 47-04.22N 003-19.86W until 27 mar2023-03-21
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 11:25Z; 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.