Nav aids

Isolated danger buoy established in 13-42.76N 109-14.90E

South China Sea · HYDROPAC 3951/17

What this record establishes

Archived notice · 2018-09-07 11:39Z

This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.

Source and dates
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · HAIPHONG RADIO 150045Z NOV 17.. Issued 2017-11-15 04:23Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
South China Sea. The parsed report position is 13.713, 109.248. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the South China Sea →

issued
2017-11-15 04:23Z
status
Archived notice
authority
HAIPHONG RADIO 150045Z NOV 17.
issued by
HAIPHONG RADIO
sea
South China Sea
position
13.713, 109.248
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SOUTH CHINA SEA.
VIETNAM.
DNC 11.
CHART 93480.
ISOLATED DANGER BUOY ESTABLISHED IN
13-42.76N 109-14.90E.

Reading this warning

DNC (Digital Nautical Chart)
A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
Chart reference
The number of the nautical chart on which the reported position lies.
Position (degrees and minutes)
How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.

All warning terms →

Collected reports in this area · aids-to-navigation notices

3 within 180 nm since 2013 · 0 in the last 12 months · 0 listed in force now

13
15
17

Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.

Nearby notices listed in force · within 120 nm

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

146 aids-to-navigation notices listed in force · see all

Record snapshot 2026-09-25 00:58Z; source collection times vary.

Nav aids

Lights extinguished, buoys off station, RACON/NAVTEX outages. All current aids-to-navigation notices →

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.