Seismic survey in progress until 30 jul by vessel towing 6000 meter long cable in area bound by 38-44-59N…
Yellow Sea · HYDROPAC 988/09
What this record establishes
Archived notice · 2009-07-31 00:00Z
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 322/09 24 MAY 09.. Issued 2009-05-24 12:18Z. 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
- Yellow 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.
- issued
- 2009-05-24 12:18Z
- status
- Archived notice
- authority
- NAVAREA XI 322/09 24 MAY 09.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Yellow Sea
- position
- 38.592, 124.205
- 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 30 JUL BY VESSEL TOWING 6000 METER LONG CABLE IN AREA BOUND BY 38-44-59N 123-55-05E, 38-45-59N 124-17-11E, 38-34-23N 124-18-05E, 38-35-03N 124-32-27E, 38-28-00N 124-32-58E, 38-26-31N 124-01-20E, 38-30-37N 124-01-00E, 38-35-52N 124-04-11E, 38-39-06N 123-55-32E. 2. CANCEL THIS MSG 31 JUL.
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.
- 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
6 within 180 nm since 1999 · 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.
- Seismic survey in progress until 31 oct in area bound by 37-57.8N 121-21.7E, 37-39.6N 122-00.2E, 37-37.7N…2002-08-26
- Underwater cable operations 02 thru 06 jul by cableship kdd ocean link in area bound by 36-49.6N 125-33.3E,…1999-07-01
- Underwater cable operations in progress until 30 jun by cableship kdd ocean link in area bound by 36-43.7N…1999-06-25
- Underwater cable operations in progress until 25 jun by cableship kdd ocean link in area bound by 36-43.7N…1999-06-24
- Underwater cable operations 19 thru 24 jun by cableship kdd ocean link in area bound by 36-43.7N 125-12.0E,…1999-06-14
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
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 03:58Z; 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.