Seismic survey 260001Z sep to 302359Z nov by vessel towing 4000 meter long cable in area bound by 28-20N…
Eastern China Sea · HYDROPAC 1649/03
What this record establishes
Archived notice · 2003-12-01 00:59Z
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 485/03 25 SEP 03. Issued 2003-09-25 07:50Z. 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
- 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 →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2003-09-26 00:01Z | 2003-11-30 23:59Z | — | 1583 h 58 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2003-09-25 07:50Z
- status
- Archived notice
- self-cancels
- 2003-12-01 00:59Z
- authority
- NAVAREA XI 485/03 25 SEP 03
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Eastern China Sea
- position
- 27.475, 123.193
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. SEISMIC SURVEY 260001Z SEP TO 302359Z NOV BY VESSEL TOWING 4000 METER LONG CABLE IN AREA BOUND BY 28-20N 122-25E, 28-35N 123-00E, 28-05N 124-20E, 27-40N 124-20E, 27-30N 123-30E, 26-30N 122-55E, 26-15N 123-10E, 25-50N 122-45E, 26-00N 122-25E, 26-30N 122-25E, 27-55N 123-15E, 28-00N 122-30E. 2. CANCEL THIS MSG 010059Z DEC.
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.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
- 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
115 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.
- Cable operations 100900Z may until further notice by cableship peter faber in area bound by 24-51.27N…2024-05-10
- Cable operations in progress until 10 may by cableship resolute in area bound by 25-27.30N 122-27.59E,…2024-05-02
- Cable operations 06 apr until further notice by cableship peter faber in area bound by 25-45.62N 121-34.67E,…2024-04-05
- Cable operations by cableship kddi ocean link: a. 03 thru 08 dec, alternate 09 thru 11 dec in area bound by…2023-11-28
- Cable operations in progress until 26 dec by cableship kddi ocean link in area bound by 25-37.62N…2022-12-19
- Cable operations 14 thru 18 dec, alternate 19 thru 21 dec by cableship kddi ocean link in area bound by…2022-12-12
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
23 cable & pipeline work listed in force · see all
Record snapshot 2026-09-28 03:39Z; 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.