Cable ops

Cable operations 24 thru 30 may, alternate 31 may thru 02 jun by cableship kddi ocean link in area bound by…

Eastern China Sea · HYDROPAC 1723/23

What this record establishes

Archived notice · 2023-05-29 12:21Z

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 177/23 231138Z MAY 23.. Issued 2023-05-23 12:38Z. 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
2023-05-23 12:38Z
status
Archived notice
self-cancels
2023-06-03 00:01Z
authority
NAVAREA XI 177/23 231138Z MAY 23.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
Eastern China Sea
position
31.044, 123.855
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 24 THRU 30 MAY, ALTERNATE
   31 MAY THRU 02 JUN BY CABLESHIP KDDI OCEAN
   LINK IN AREA BOUND BY
   30-55.00N 123-19.07E, 30-55.94N 123-18.44E,
   31-06.36N 123-39.51E, 31-00.17N 124-02.75E,
   30-58.93N 124-03.91E, 30-58.28N 124-02.90E,
   30-59.27N 124-02.02E, 31-05.08N 123-39.62E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 030001Z JUN 23.

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.
CANCEL THIS MSG
The warning's own expiry: a line telling the reader when the message cancels itself.
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.

All warning terms →

Collected reports in this area · cable & pipeline work

125 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

25 cable & pipeline work listed in force · see all

Record snapshot 2026-09-29 16:55Z; 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.