Exercises

Hazardous operations

Gulf of Tonkin · Vietnam · HYDROPAC 3150/15

issued: 2015-09-22 13:00Z
status: cancelled 2015-10-01 12:00Z (archive)
self-cancels: 2015-10-01 12:00Z
authority: HAIPHONG RADIO 221231Z SEP 15.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

GULF OF TONKIN.
VIETNAM.
HAZARDOUS OPERATIONS.
DNC 23.
1. HAZARDOUS OPERATIONS 272300Z TO 301100Z SEP,
   ALTERNATE 282300Z SEP TO 011100Z OCT
   IN AREA BETWEEN
   20-52.98N 20-29.98N AND 107-24.29E 107-48.29E.
2. CANCEL THIS MSG 011200Z OCT 15.

Activity windows · 2 in this warning

opens (UTC)	closes (UTC)	local	length
2015-09-27 23:00Z	2015-09-30 11:00Z	—	60 h
2015-09-28 23:00Z	2015-10-01 11:00Z	—	60 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.