Exercises

Hazardous operations

Gulf of Tonkin · Vietnam · HYDROPAC 2379/15

issued: 2015-07-20 13:00Z
status: cancelled 2015-07-23 09:00Z (archive)
self-cancels: 2015-07-23 09:00Z
authority: HAIPHONG RADIO 201243Z JUL 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 220001Z TO 220800Z JUL,
   ALTERNATE 230001Z TO 230800Z JUL
   IN AREA BETWEEN
   20-36N 20-51N AND 107-43E 107-24E.
2. CANCEL THIS MSG 230900Z JUL 15.

Activity windows · 2 in this warning

opens (UTC)	closes (UTC)	local	length
2015-07-22 00:01Z	2015-07-22 08:00Z	—	7 h 59
2015-07-23 00:01Z	2015-07-23 08:00Z	—	7 h 59

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.