Exercises

Hazardous operations 140001Z to 140130Z nov, alternate 140700Z to 140800Z nov in area bound by 11-57.55N…

South China Sea · Vietnam · HYDROPAC 4099/18

issued
2018-11-13 13:20Z
status
cancelled 2018-11-14 09:00Z (archive)
self-cancels
2018-11-14 09:00Z
authority
HAIPHONG RADIO 131237Z NOV 18.
sea
South China Sea
position
11.946, 109.293
source
nga_json · first seen 2026-08-17 13:38Z

Original warning text

SOUTH CHINA SEA.
VIETNAM.
DNC 11.
1. HAZARDOUS OPERATIONS 140001Z TO 140130Z NOV,
   ALTERNATE 140700Z TO 140800Z NOV
   IN AREA BOUND BY
   11-57.55N 109-16.23E, 11-57.18N 109-19.13E,
   11-55.73N 109-18.42E, 11-56.83N 109-15.85E.
2. CANCEL THIS MSG 140900Z NOV 18.

Activity windows · 2 in this warning

opens (UTC)closes (UTC)locallength
2018-11-14 00:01Z2018-11-14 01:30Z1 h 29
2018-11-14 07:00Z2018-11-14 08:00Z1 h

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

This area · military exercises

51 within 180 nm since 2015 · 0 in the last 12 months · 0 in force now

15
20
22

Season · when military exercises happen here

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

month of issue, all years in the archive

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

35 military exercises in force · see all

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.