Seismic survey in progress until 20 jun by M/V cgg harmattan towing six 6000 meter long cables in area bound…
South Atlantic Ocean · HYDROLANT 1754/01
What this record establishes
Archived notice · 2001-06-18 14:15Z
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) · NAVAREA V 1044/01 180401Z JUN 01; NAVAREA VI 169/01 171400Z JUN 01; WZ 1300/01 172356Z JUN 01. Issued 2001-06-18 05:50Z. 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
- South Atlantic Ocean. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Punta mogotes light 38-05.6S 057-32.5W range temporarily reduced to 13 milescancelled by this notice
- Underwater operations in progress until further notice by M/V havila reel vicinity 51-02N 004-59Wcancelled by this notice
- Underwater operations in progress until further notice by M/V neftegaz 31 vicinity of trackline between…later cancellation notice
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2001-06-18 05:50Z
- status
- Archived notice
- authority
- NAVAREA V 1044/01 180401Z JUN 01; NAVAREA VI 169/01 171400Z JUN 01; WZ 1300/01 172356Z JUN 01
- NAVAREA
- NAVAREA V · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -22.575, -40.440
- vessel
- M/V CGG HARMATTAN · 473 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. SEISMIC SURVEY IN PROGRESS UNTIL 20 JUN BY M/V CGG HARMATTAN TOWING SIX 6000 METER LONG CABLES IN AREA BOUND BY 22-12S 040-45W, 22-35S 039-40W, 22-55S 040-30W, 22-40S 041-00W. FOUR MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 1712/01(23). 3. CANCEL HYDROLANT 1748/01(37), OPERATIONS COMPLETED. 4. CANCEL THIS MSG 21 JUN.
Reading this warning
- Seismic survey
- A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
- 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.
- 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 · cable & pipeline work
1890 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.
- Cable operations in progress until 03 feb 25 by cableship bold maverick in: a. 22-11.33S 041-06.38W2024-09-05
- Underwater operations 1100Z to 2100Z daily 19 thru 24 apr by cableship intrepid in 20-22.45S 040-11.23W2021-04-18
- Seismic deflector gear adrift in 23-08.50S 042-53.90W at 071300Z sep2019-09-07
- Seismic survey 21 thru 28 jan by oceanic champion towing 12 8000 meter long cables in area bound by…2017-01-19
- Seismic survey 14 thru 21 jan by oceanic champion towing 12 8000 meter cables in area bound by 25-33.47S…2017-01-10
- Seismic survey in progress until 14 jan by oceanic champion towing 12 8000 meter cables in area bound by…2017-01-07
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
- Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 7.9 nm
- Underwater operations in progress until 250259Z sep by M/V siem pilot in 22-25.32S 039-56.55WSurveys · 29.1 nm
- Underwater operations in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 41.4 nm
- RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 46.7 nm
Worldwide in the collected sources
23 cable & pipeline work listed in force · see all
Record snapshot 2026-09-24 23:21Z; source collection times vary.
Cable ops
Cable laying, pipeline and seismic operations. All current cable & pipeline work →
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.