Other

Acoustic operations 0001Z to 1300Z daily: a. 07 may in area bound by 26-07N 122-35E, 25-45N 123-02E, 25-41N…

Eastern China Sea · HYDROPAC 793/03

What this record establishes

Archived notice · 2003-05-12 14:00Z

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) · CTG 72.2 060001Z MAY 03 PHONCON CAPTAIN GILLIS 070930Z MAY 03. Issued 2003-05-07 09:50Z. 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 →

issued
2003-05-07 09:50Z
status
Archived notice
self-cancels
2003-05-12 14:00Z
authority
CTG 72.2 060001Z MAY 03 PHONCON CAPTAIN GILLIS 070930Z MAY 03
issued by
CTG
sea
Eastern China Sea
position
33.042, 124.824
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. ACOUSTIC OPERATIONS 0001Z TO 1300Z DAILY:
   A. 07 MAY IN AREA BOUND BY
      26-07N 122-35E, 25-45N 123-02E, 25-41N 122-51E,
      25-53N 122-34E, 25-49N 122-21E, 25-55N 122-22E.
   B. 09 MAY IN AREA BOUND BY
      27-23N 124-44E, 27-02N 125-08E,
      26-37N 124-40E, 26-58N 124-16E.
   C. 10 MAY IN AREA BOUND BY
      33-25N 124-48E, 33-00N 125-18E,
      32-39N 124-51E, 33-05N 124-21E.
   D. 11 MAY IN AREA BOUND BY
      29-57N 126-47E, 29-44N 127-19E,
      29-12N 127-00E, 29-24N 126-29E.
   E. 12 MAY IN AREA BOUND BY
      22-38N 119-06E, 22-24N 119-35E, 22-09N 119-01E,
      22-15N 118-51E, 22-25N 119-09E, 22-32N 118-57E.
   F. ALTERNATE 12 MAY IN AREA BOUND BY
      33-53N 128-09E, 33-53N 128-17E, 33-34N 128-30E,
      33-13N 127-47E, 33-36N 127-31E.
2. CANCEL THIS MSG 121400Z MAY.

Reading this warning

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.
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 · other warnings

15 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
11

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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

21 other warnings listed in force · see all

Record snapshot 2026-10-02 19:42Z; source collection times vary.

Other

Everything the classifier did not place elsewhere. All current other warnings →

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.