Wellheads established in areas bound by: a. 51-20-39N 143-49-09E, 51-33-02N 143-43-47E, 51-34-49N…
Sea of Okhotsk · HYDROPAC 52/20
What this record establishes
Archived notice · 2020-04-08 09:26Z
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 XIII 1/20 040907Z JAN 20.. Issued 2020-01-04 09:13Z. 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
- Sea of Okhotsk. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Wellheads established in areas bound by: a. 51-23-15N 143-51-31E, 51-31-37N 143-47-51E, 51-32-14N…cancelled by this notice
- Cancel HYDROPAC 52/20 and this msglater cancellation notice
Current notices and reporting history in the Sea of Okhotsk →
- issued
- 2020-01-04 09:13Z
- status
- Archived notice
- authority
- NAVAREA XIII 1/20 040907Z JAN 20.
- NAVAREA
- NAVAREA XIII · named as the source of this relay
- sea
- Sea of Okhotsk
- position
- 51.372, 144.072
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SEA OF OKHOTSK.
SAKHALIN.
DNC 24.
1. WELLHEADS ESTABLISHED IN AREAS BOUND BY:
A. 51-20-39N 143-49-09E, 51-33-02N 143-43-47E,
51-34-49N 143-54-31E, 51-22-23N 143-59-53E.
B. 51-17-23N 143-55-34E, 51-20-44N 143-55-47E,
51-23-04N 144-02-53E, 51-24-43N 144-20-53E,
51-16-54N 144-27-42E, 51-13-17N 144-12-41E.
2. CANCEL HYDROPAC 3620/19.
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.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- 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.
- 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
3 within 180 nm since 2019 · 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.
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
- Wave rider buoy established in 51-22.54N 144-14.17ENav aids · 6.2 nm
- Underwater operations 25 may thru 31 dec in area bound by 51-34.92N 143-24.27E, 51-34.90N 144-06.22E,…Surveys · 11.5 nm
- Underwater operations 01 may thru 31 oct in areas bound by: a. 51-27.95N 143-26.72E, 51-29.25N 143-45.52E,…Surveys · 13.3 nm
Worldwide in the collected sources
2 offshore structure notices listed in force · see all
Record snapshot 2026-10-02 07:43Z; 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.