Cable ops

Cable operations 19 thru 24 dec, alternate 25 dec thru 02 jan 21 by cableship kddi ocean link in area bound…

Eastern China Sea · HYDROPAC 3784/20

What this record establishes

Archived notice · 2020-12-26 22:25Z

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 490/20 181143Z DEC 20.. Issued 2020-12-21 15:46Z. 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.

Related notices and cancellation links

Current notices and reporting history in the Eastern China Sea →

issued
2020-12-21 15:46Z
status
Archived notice
authority
NAVAREA XI 490/20 181143Z DEC 20.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
Eastern China Sea
position
31.244, 122.887
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EAST CHINA SEA.
CHINA.
DNC 23.
1. CABLE OPERATIONS 19 THRU 24 DEC, ALTERNATE
   25 DEC THRU 02 JAN 21 BY CABLESHIP KDDI OCEAN
   LINK IN AREA BOUND BY
   31-21.2N 122-42.3E, 31-21.2N 122-48.0E,
   31-19.8N 122-50.5E, 31-10.3N 122-57.3E,
   31-09.6N 122-55.8E, 31-19.0N 122-49.3E,
   31-19.8N 122-47.3E, 31-19.8N 122-42.3E.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROPAC 3609/20, 3743/20.
3. CANCEL THIS MSG 03 JAN 21.

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.
Cable operations
A ship is laying, burying or repairing a submarine cable, usually along a stated route.
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.

All warning terms →

Collected reports in this area · cable & pipeline work

119 within 180 nm since 1998 · 0 in the last 12 months · 0 listed in force now

98
00
05
10
15
20
23

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.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

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

Worldwide in the collected sources

24 cable & pipeline work listed in force · see all

Record snapshot 2026-10-02 04:37Z; 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.