Survey operations in progress until 30 apr by M/V ramform sovereign towing 14 9500 meter long cables in area…
South China Sea · HYDROPAC 213/22
What this record establishes
Archived notice · 2022-04-26 12:25Z
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 XI 35/22 251821Z JAN 22.. Issued 2022-01-25 18:47Z. 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 China 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.
Related notices and cancellation links
- Survey operations in progress until further notice by M/V ramform sovereign towing 14 9500 meter long cables…cancelled by this notice
- Cancel HYDROPAC 213/22 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the South China Sea →
- issued
- 2022-01-25 18:47Z
- status
- Archived notice
- authority
- NAVAREA XI 35/22 251821Z JAN 22.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- South China Sea
- position
- 3.657, 111.253
- vessel
- M/V RAMFORM SOVEREIGN · 63 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SOUTH CHINA SEA. DNC 11. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 30 APR BY M/V RAMFORM SOVEREIGN TOWING 14 9500 METER LONG CABLES IN AREA BOUND BY 04-52.3N 111-24.3E, 04-06.6N 111-20.6E, 03-37.8N 111-53.3E, 02-57.6N 111-28.6E, 03-09.3N 111-09.8E, 02-44.2N 110-53.7E, 02-56.2N 110-35.2E, 03-41.6N 111-03.9E, 04-52.4N 111-06.3E. WIDE BERTH REQUESTED. 2. CANCEL HYDROPAC 43/22. 3. CANCEL THIS MSG 01 MAY 22.
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.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf 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
11 within 180 nm since 2006 · 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 in progress until further notice by M/V ramform sovereign towing 12 9000 meter long cables…2023-08-23
- Survey operations in progress until further notice by M/V ramform sovereign towing 12 9000 meter long cables…2023-06-04
- Survey operations in progress until further notice by M/V ramform sovereign towing 14 9500 meter long cables…2022-01-06
- Survey operations in progress until further notice by M/V ramform sovereign towing 14 9500 meter long cables…2021-12-29
- Survey operations in progress until further notice by M/V ramform sovereign towing 14 9500 meter long cables…2021-10-28
- Survey operations in progress until further notice by M/V ramform sovereign towing 14 9500 meter long cables…2021-10-12
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
55 survey operations listed in force · see all
Record snapshot 2026-10-01 11:23Z; 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.