Exercises

Gunnery exercises 2300Z to 0400Z commencing daily 01, 02, 04, 05, 10 thru 12, 15 thru 19, 22 thru 26, 29 and…

Philippine Sea · HYDROPAC 3313/17

What this record establishes

Archived notice · 2017-10-31 10:00Z

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) · NAVAREA XI 628/17 271139Z SEP 17 - NAVAREA XI 629/17 271139Z SEP 17.. Issued 2017-09-27 11:47Z. 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
Philippine 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 Philippine Sea →

issued
2017-09-27 11:47Z
status
Archived notice
self-cancels
2017-10-31 10:00Z
authority
NAVAREA XI 628/17 271139Z SEP 17 - NAVAREA XI 629/17 271139Z SEP 17.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
Philippine Sea
position
23.433, 122.331
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

PHILIPPINE SEA.
TAIWAN-EAST COAST.
DNC 23.
1. GUNNERY EXERCISES 2300Z TO 0400Z COMMENCING
   DAILY 01, 02, 04, 05, 10 THRU 12, 15 THRU 19,
   22 THRU 26, 29 AND 30 OCT, 0600Z TO 0900Z DAILY
   02, 03, 05, 06, 11 THRU 13, 16 THRU 20,
   23 THRU 27, 30 AND 31 OCT
   IN AREA BOUND BY
   23-43N 122-05E, 23-43N 122-38E,
   23-20N 122-38E, 23-00N 122-05E.
2. CANCEL HYDROPAC 3014/17(94,97), OPERATIONS COMPLETED.
3. CANCEL THIS MSG 311000Z OCT 17.

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.
Gunnery and live firing
Naval or coastal guns firing into a sea area for practice, at stated times.
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.
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.
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 · military exercises

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

99
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

28 military exercises listed in force · see all

Record snapshot 2026-10-02 01:23Z; 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.