Survey operations in progress until 09 jun by M/V polaris towing equipment in area bound by 24-59N 122-27E,…
Eastern China Sea · HYDROPAC 1586/16
What this record establishes
Archived notice · 2016-06-10 00:01Z
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) · WONG 290326Z MAY 16.. Issued 2016-05-29 05:40Z. 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
- Eastern 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 Eastern China Sea →
- issued
- 2016-05-29 05:40Z
- status
- Archived notice
- authority
- WONG 290326Z MAY 16.
- issued by
- WONG
- sea
- Eastern China Sea
- position
- 24.928, 122.244
- vessel
- M/V POLARIS · 3 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
PHILIPPINE SEA. EAST CHINA SEA. TAIWAN-NORTHEAST COAST. DNC 23. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 09 JUN BY M/V POLARIS TOWING EQUIPMENT IN AREA BOUND BY 24-59N 122-27E, 24-57N 122-27E, 24-51N 121-50E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 10 JUN 16.
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.
- 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.
- 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
5 within 180 nm since 2000 · 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.
- Underwater operations daily 27 may thru 07 jun by M/V kdd ocean link in area bound by 25-47.9N 122-05.8E,…2006-05-25
- Underwater operations 28 apr thru 02 may by M/V joides resolution vicinity 24-48N 122-30E2001-04-27
- Survey operations 30 apr thru 24 may, alternate 25 thru 31 may by M/V orient explorer towing 3000 meter long…2001-04-25
- Underwater operations in progress until 30 jul within two miles of 25-13-21N 120-04-18E2000-06-06
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
- 74 km s of yonakuni, japanQuakes · 76.9 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-01 18:33Z; 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.