Survey operations in progress in area bound by: a. 12-30.67N 109-23.32E, 12-30.31N 109-17.44E, 12-29.59N…
South China Sea · HYDROPAC 2996/19
What this record establishes
Archived notice · 2022-03-18 13:56Z
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) · HAIPHONG RADIO 121232Z SEP 19.. Issued 2019-09-12 15:50Z. 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 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.
Current notices and reporting history in the South China Sea →
- issued
- 2019-09-12 15:50Z
- status
- Archived notice
- authority
- HAIPHONG RADIO 121232Z SEP 19.
- issued by
- HAIPHONG RADIO
- sea
- South China Sea
- position
- 12.503, 109.319
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SOUTH CHINA SEA. VIETNAM. DNC 11. SURVEY OPERATIONS IN PROGRESS IN AREA BOUND BY: A. 12-30.67N 109-23.32E, 12-30.31N 109-17.44E, 12-29.59N 109-16.69E. B. 12-29.48N 109-16.73E, 12-29.46N 109-16.71E, 12-29.58N 109-16.59E, 12-29.64N 109-16.65E, 12-29.52N 109-16.77E, 12-29.50N 109-16.74E, 12-29.59N 109-16.64E, 12-29.58N 109-16.63E. WIDE BERTH REQUESTED.
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.
- 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.
Collected reports in this area · survey operations
16 within 180 nm since 2016 · 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 10 oct by M/V polarcus alima towing six four mile long cables in area…2020-09-09
- Survey operations in progress in area bound by 10-29.64N 107-49.46E, 10-29.64N 107-49.74E, 10-29.37N…2019-09-03
- Survey operations in progress until 06 jun by M/V elsa regent towing 10000 meter long cable in area bound by…2019-04-12
- Survey operations in progress until 25 jun in area bound by 11-50.00N 109-16.00E, 11-50.00N 109-25.53E,…2019-04-11
- Survey operations in progress until 02 jun by M/V elsa regent towing 10000 meter long cable in area bound by…2019-04-11
- Survey operations 11 apr thru 02 jun by M/V elsa regent towing 10000 meter long cable in area bound by…2019-04-10
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
56 survey operations listed in force · see all
Record snapshot 2026-10-01 21:06Z; 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.