Northern South China Sea
South China Sea · HYDROPAC 2493/13
What this record establishes
Archived notice · 2015-12-20 11:20Z
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) · NAVAREA XI 609/13 210156Z AUG 13.. Issued 2013-08-21 06:14Z. 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 21.743, 116.028. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROPAC 4143/15, false alertlater cancellation notice
Current notices and reporting history in the South China Sea →
- issued
- 2013-08-21 06:14Z
- status
- Archived notice
- authority
- NAVAREA XI 609/13 210156Z AUG 13.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- South China Sea
- position
- 21.743, 116.028
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTHERN SOUTH CHINA SEA. CHART 93730 PARTIALLY SUBMERGED STRUCTURE, FIVE METERS VISIBLE ABOVE SURFACE, VICINITY 21-44.6N 116-01.7E.
Reading this warning
- Chart reference
- The number of the nautical chart on which the reported position lies.
- Semi-submerged
- Floating at or just below the surface, so hard to see by eye or radar.
- 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.
Collected reports in this area · other warnings
12 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now
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.
- Recent ship reports indicate local traffic is still using traffic separation scheme (tss) oriented 090-270…2016-04-07
- Pipelaying operations in progress until 30 oct vicinity of trackline joining 20-14.9N 114-54.0E, 19-54.7N…2014-04-28
- Pipelaying operations in progress until 31 dec vicinity of trackline between 21-22.8N 114-54.8E and 21-20.9N…2013-12-17
- Pipelaying operations in progress until 31 dec vicinity of trackline between 21-11.4N 115-01.4E and 21-20.9N…2013-12-06
- Pipelaying operations in progress until 29 sep vicinity of trackline between 20-05.5N 114-38.0E and 20-14.9N…2013-08-15
- Pipelaying operations in progress until 30 oct along trackline line joining 20-14.9N 114-54.0E, 19-56.4N…2013-06-24
Month of issue in the collected archive
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
23 other warnings listed in force · see all
Record snapshot 2026-10-02 01:25Z; source collection times vary.
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.