RACON at helen mar reef light 01-07.4N 103-46.5E off air
Singapore Strait · HYDROPAC 4020/15
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) · NAVAREA XI 932/15 100305Z DEC 15.. Issued 2015-12-10 04:12Z. 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
- Singapore Strait. The parsed report position is 1.123, 103.775. 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 Singapore Strait →
- issued
- 2015-12-10 04:12Z
- status
- Archived notice
- authority
- NAVAREA XI 932/15 100305Z DEC 15.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Singapore Strait
- position
- 1.123, 103.775
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SINGAPORE STRAIT. DNC 03. CHART 71252. RACON AT HELEN MAR REEF LIGHT 01-07.4N 103-46.5E OFF AIR.
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.
- RACON (radar beacon)
- A radar beacon on a buoy, lighthouse or structure that answers a ship's radar with a Morse-code mark on the screen.
- 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.
- Inoperative / unreliable / off air
- An aid or radio service is not working as charted or published.
Collected reports in this area · aids-to-navigation notices
66 within 180 nm since 1999 · 2 in the last 12 months · 2 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.
- Batu berhanti isolated danger light buoy 01-11.76N 103-52.51E temporarily removed2026-06-21
- Batu berhanti isolated danger marks light buoy, 01-11.76N 103-52.51E, temporarily removed2026-06-21
- South cardinal buoy 01-03.59N 103-38.86E unlit2025-03-23
- Radio beacon at takong light 01-05.90N 103-43.25E off air and unlit until further notice2024-03-24
- RACON at south cardinal buoy 01-03.61N 103-38.96E off air2023-12-11
- RACON at south cardinal buoy 01-03.61N 103-38.96E temporarily removed2023-12-11
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
- Batu berhanti isolated danger marks light buoy, 01-11.76N 103-52.51E, temporarily removedNav aids · 7.4 nm
- Batu berhanti isolated danger light buoy 01-11.76N 103-52.51E temporarily removedNav aids · 7.4 nm
- Submarine cable repairing works by c/v peter faber, 23 sep to until further noticeCable ops · 23.6 nm
- Cable operations in progress until further notice by cableship peter faber in vicinity 01-16.75N 104-08.14ECable ops · 23.6 nm
Worldwide in the collected sources
134 aids-to-navigation notices listed in force · see all
Record snapshot 2026-10-02 21:40Z; 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.