Exercises

Hazardous operations 140100Z to 140500Z sep, alternate 150100Z to 150500Z sep in area between 20-52.33N…

Gulf of Tonkin · Vietnam · HYDROPAC 3112/17

issued: 2017-09-12 03:27Z
status: cancelled 2017-09-15 06:00Z (archive)
self-cancels: 2017-09-15 06:00Z
authority: HAIPHONG RADIO 120100Z SEP 17.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

GULF OF TONKIN.
VIETNAM.
DNC 23.
1. HAZARDOUS OPERATIONS 140100Z TO 140500Z SEP,
   ALTERNATE 150100Z TO 150500Z SEP
   IN AREA BETWEEN
   20-52.33N 20-55.00N AND 107-10.00E 107-14.00E.
2. CANCEL THIS MSG 150600Z SEP 17.

Activity windows · 2 in this warning

opens (UTC)	closes (UTC)	local	length
2017-09-14 01:00Z	2017-09-14 05:00Z	—	4 h
2017-09-15 01:00Z	2017-09-15 05:00Z	—	4 h

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

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.