Other
Navigation prohibited: a. until 270500Z may in area between 20-50.60N 20-50.20N and 107-05.40E 107-05.83E
Gulf of Tonkin · Vietnam · HYDROPAC 1852/17
- issued
- 2017-05-27 00:46Z
- status
- cancelled 2017-05-31 17:00Z (archive)
- self-cancels
- 2017-05-31 17:00Z
- authority
- HAIPHONG RADIO 270115Z MAY 17.
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
GULF OF TONKIN.
VIETNAM.
DNC 23.
CHART 93650.
1. NAVIGATION PROHIBITED:
A. UNTIL 270500Z MAY IN AREA BETWEEN
20-50.60N 20-50.20N AND 107-05.40E 107-05.83E.
B. 300001Z TO 301700Z MAY, ALTERNATE 310001Z TO
311600Z MAY IN AREA BETWEEN
20-41.70N 20-50.00N AND 107-25.50E 107-32.90E.
2. CANCEL THIS MSG 311700Z MAY 17.
Activity windows · 2 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2017-05-30 00:01Z | 2017-05-30 17:00Z | — | 16 h 59 |
| 2017-05-31 00:01Z | 2017-05-31 16:00Z | — | 15 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
34 other warnings in force · see all
Other
Everything the classifier did not place elsewhere. All current other warnings →
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.