Exercises
Hazardous operations
Gulf of Tonkin · Vietnam · HYDROPAC 2157/15
- issued
- 2015-06-27 17:07Z
- status
- cancelled 2015-07-05 10:00Z (archive)
- self-cancels
- 2015-07-05 10:00Z
- authority
- HAIPHONG RADIO 271248Z JUN 15.
- sea
- South China Sea
- position
- 20.263, 106.644
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
GULF OF TONKIN. VIETNAM. HAZARDOUS OPERATIONS. DNC 23. 1. HAZARDOUS OPERATIONS 2200Z TO 0900Z COMMENCING DAILY 01 THRU 04 JUL IN AREA BOUND BY 20-20-00N 106-37-00E, 20-18-00N 106-43-00E, 20-11-40N 106-40-00E, 20-13-00N 106-34-40E. 2. CANCEL THIS MSG 051000Z JUL 15.
Activity windows · 4 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2015-07-01 22:00Z | 2015-07-02 09:00Z | — | 11 h |
| 2015-07-02 22:00Z | 2015-07-03 09:00Z | — | 11 h |
| 2015-07-03 22:00Z | 2015-07-04 09:00Z | — | 11 h |
| 2015-07-04 22:00Z | 2015-07-05 09:00Z | — | 11 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
27 within 180 nm since 2014 · 0 in the last 12 months · 0 in force now
14
15
19
- Hazardous operations 200500Z to 200930Z dec, alternate 210500Z to 210930Z dec in area bound by 19-12.11N…2019-12-18
- Hazardous operations 232300Z to 240400Z oct in area bound by 18-47.81N 105-57.80E, 18-47.95N 106-02.10E,…2019-10-23
- Hazardous operations 212300Z to 221700Z oct, alternate 0500Z to 1700Z daily 23 and 24 oct in area bound by…2019-10-20
- Hazardous operations in areas bound by: a. 220001Z to 220300Z, 0001Z to 0300Z daily 23 and 24 oct 20-42.6N…2019-10-20
- Hazardous operations 260100Z to 260400Z sep, alternate 270100Z to 270400Z sep in area bound by 20-49.1N…2019-09-24
- Hazardous operations 240630Z to 240930Z, 250001Z to 250430Z, 250630Z to 250930Z and 260001Z to 260430Z sep…2019-09-22
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.