Exercises
Hazardous operations 270001Z to 271100Z apr in area bound by 20-47.33N 107-26.87E, 20-47.33N 107-29.83E,…
Gulf of Tonkin · Vietnam · HYDROPAC 1631/18
- issued
- 2018-04-26 15:40Z
- status
- cancelled 2018-04-27 00:01Z (archive)
- self-cancels
- 2018-04-27 00:01Z
- authority
- HAIPHONG RADIO 261233Z APR 18.
- sea
- South China Sea
- position
- 20.740, 107.478
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
GULF OF TONKIN. VIETNAM. DNC 23. 1. HAZARDOUS OPERATIONS 270001Z TO 271100Z APR IN AREA BOUND BY 20-47.33N 107-26.87E, 20-47.33N 107-29.83E, 20-41.72N 107-31.00E, 20-41.72N 107-26.87E. 2. CANCEL THIS MSG 270001Z APR 18.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-04-27 00:01Z | 2018-04-27 11:00Z | — | 10 h 59 |
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
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A
M
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J
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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.