Nga chart 74510 (2ND ed)
Indian Ocean · HYDROPAC 772/11
What this record establishes
Archived notice · 2011-07-16 09:05Z
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) · AUSCOAST 94/11 120614Z MAR 11 - AUSCOAST 49/11 CX 120941Z MAR 11.. Issued 2011-03-12 10:31Z. 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
- Indian Ocean. The parsed report position is -20.023, 116.310. 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
- issued
- 2011-03-12 10:31Z
- status
- Archived notice
- authority
- AUSCOAST 94/11 120614Z MAR 11 - AUSCOAST 49/11 CX 120941Z MAR 11.
- issued by
- AUSCOAST
- sea
- Indian Ocean
- position
- -20.023, 116.310
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
AUSTRALIA-NORTHWEST COAST. NGA CHART 74510 (2ND ED). 1. PLATFORM ESTABLISHED IN 20-01.4S 116-18.6E. 2.5 MILE BERTH REQUESTED. 2. CANCEL HYDROPAC 419/11, OPERATIONS COMPLETED.
Reading this warning
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
Collected reports in this area · offshore structure notices
2 within 180 nm since 2011 · 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.
- Australia-northwest Coast2013-02-10
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
- Special purpose vessel fugro kwilena / MLOV8 / 503147420 conducting underwater operations in an area bounded…Surveys · 42.4 nm
- Special purpose vessel ve constructor / H9YT / 373335000 conducting underwater operations in an area bounded…Surveys · 49.2 nm
- Underwater operations in progress until further notice by vessel ve constructor in area bound by 19-12.00S…Surveys · 49.2 nm
- Special purpose vessel nexans aurora / LALC8 / 257682000 conducting cable laying operations from 19 52.44S…Cable ops · 75 nm
- Drill rig jansz FCS/995031119 in position 19-52.73S 114-36.50E 2.5 nm clearance requestedSurveys · 96.4 nm
Worldwide in the collected sources
2 offshore structure notices listed in force · see all
Record snapshot 2026-10-02 20:50Z; source collection times vary.
Structures
Platforms, wind turbines and fish farms established, under construction or removed. All current offshore structure 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.