Exercises

Hazardous operations 222300Z to 231330Z may, alternate 242300Z to 251330Z may in areas bound by: k.…

South China Sea · HYDROPAC 1702/19

What this record establishes

Archived notice · 2019-05-25 14:30Z

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) · HAIPHONG RADIO 221230Z MAY 19.. Issued 2019-05-22 17:09Z. 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
South 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 South China Sea →

Activity windows · 2 in this warning

opens (UTC)closes (UTC)locallength
2019-05-22 23:00Z2019-05-23 13:30Z—14 h 30
2019-05-24 23:00Z2019-05-25 13:30Z—14 h 30

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2019-05-22 17:09Z
status
Archived notice
self-cancels
2019-05-25 14:30Z
authority
HAIPHONG RADIO 221230Z MAY 19.
issued by
HAIPHONG RADIO
sea
South China Sea
position
8.489, 113.170
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SOUTH CHINA SEA.
DNC 11.
1. HAZARDOUS OPERATIONS 222300Z TO 231330Z MAY,
   ALTERNATE 242300Z TO 251330Z MAY IN AREAS BOUND BY:
   K. 10-01.13N 113-53.68E, 09-59.88N 113-56.05E,
      10-01.15N 113-51.17E, 10-01.50N 113-51.40E.
   L. 10-06.07N 113-51.57E, 10-05.75N 113-51.28E,
      10-07.20N 113-47.95E, 10-05.30N 113-47.98E.
   M. 10-00.90N 113-50.63E, 10-00.98N 113-50.67E,
      09-59.88N 113-48.93E, 09-58.68N 113-49.80E.
   N. 08-46.78N 114-03.18E, 08-46.63N 114-03.12E,
      08-46.50N 114-06.52E, 08-45.72N 114-06.13E.
   O. 08-50.00N 113-55.45E, 08-51.88N 113-57.13E,
      08-51.22N 113-57.83E, 08-49.90N 113-55.52E.
   P. 08-49.88N 113-59.55E, 08-51.50N 114-01.75E,
      08-50.25N 114-02.35E, 08-49.37N 113-59.70E.
   Q. 08-49.28N 112-39.63E, 08-49.33N 112-39.55E,
      08-50.68N 112-33.20E, 08-49.45N 112-36.18E.
   R. 08-49.62N 112-32.87E, 08-49.68N 112-33.20E,
      08-46.57N 112-36.18E, 08-46.08N 112-33.68E.
   S. 08-50.53N 112-35.55E, 08-52.65N 112-37.07E,
      08-51.92N 112-37.92E, 08-50.27N 112-35.77E.
   T. 08-09.40N 113-16.95E, 08-09.30N 113-19.50E,
      08-07.83N 113-18.85E, 08-08.95N 113-16.88E.
2. PART TWO OF TWO PART MSG. REFER TO
   HYDROPAC 1701/19 FOR FIRST GROUP OF AREAS.
3. CANCEL THIS MSG 251430Z MAY 19.

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.
Hazardous operations
NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
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.
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.
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 · military exercises

27 within 180 nm since 2000 · 4 in the last 12 months · 0 listed in force now

00
05
10
15
20
25
26

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

17 military exercises listed in force · see all

Record snapshot 2026-09-25 00:44Z; source collection times vary.

Exercises

Gunnery, firing and naval exercise areas. All current military exercises →

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.