Survey operations 26 may thru 02 jun by M/V ramform titan towing 14 10000 meter long cables in area bound by…
South Atlantic Ocean · HYDROLANT 1767/20
What this record establishes
Archived notice · 2020-05-26 21:35Z
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 187/20 252124Z MAY 20.. Issued 2020-05-25 21:52Z. 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
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2020-05-25 21:52Z
- status
- Archived notice
- authority
- NAVAREA V 187/20 252124Z MAY 20.
- NAVAREA
- NAVAREA V · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -22.628, -39.239
- vessel
- M/V RAMFORM TITAN · 89 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-SOUTHEAST COAST. DNC 01. 1. SURVEY OPERATIONS 26 MAY THRU 02 JUN BY M/V RAMFORM TITAN TOWING 14 10000 METER LONG CABLES IN AREA BOUND BY 21-45S 039-41W, 21-45S 038-37W, 23-29S 038-37W, 23-29S 039-53W, 22-01S 039-52W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 1714/20. 3. CANCEL THIS MSG 03 JUN 20.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- 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 · survey operations
743 within 180 nm since 2000 · 55 in the last 12 months · 4 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 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 19-51.63S 039-56.90W2026-09-25
- Underwater operations 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 20-23.78S 040-09.43W2026-09-25
- Underwater operations 0800Z to 1800Z daily 22 sep thru 06 oct by M/V nord houston and M/V comando b in…2026-09-21
- Underwater operations 0800Z to 1800Z daily 21 sep thru 05 oct by M/V comando b and M/V lindsaylou in…2026-09-20
- Underwater operations 0800Z to 1800Z daily 21 sep thru 05 oct by M/V comando b and M/V emerald daishan in…2026-09-20
- Underwater operations 0800Z to 1800Z daily 21 sep thru 05 oct by M/V mds ariadne and M/V comando b in…2026-09-20
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 in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 35.3 nm
- Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 66.3 nm
- RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 106.7 nm
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-09-26 20:40Z; 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.