Seismic survey 29 may thru 30 jun by M/V geo caspian towing six 4900 meter long cables in areas bound by: a.…
Sea of Okhotsk · HYDROPAC 1748/15
What this record establishes
Archived notice · 2015-06-18 09:37Z
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) · VLAD 97/15 270907Z MAY 15 - MRCC VIETNAM 280719Z MAY 15.. Issued 2015-05-28 08:55Z. 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
Current notices and reporting history in the Sea of Okhotsk →
- issued
- 2015-05-28 08:55Z
- status
- Archived notice
- authority
- VLAD 97/15 270907Z MAY 15 - MRCC VIETNAM 280719Z MAY 15.
- issued by
- VLAD
- sea
- Sea of Okhotsk
- position
- 52.714, 143.567
- vessel
- M/V GEO CASPIAN · 29 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SEA OKHOTSK.
SAKHALIN-EAST COAST.
DNC 24.
1. SEISMIC SURVEY 29 MAY THRU 30 JUN BY M/V GEO CASPIAN
TOWING SIX 4900 METER LONG CABLES IN AREAS BOUND BY:
A. 52-51-02N 143-35-15E, 52-58-44N 143-25-37E,
52-59-12N 143-31-03E, 52-58-12N 143-32-48E,
52-56-40N 143-33-10E, 52-54-26N 143-35-44E,
52-51-28N 143-36-26E.
B. 52-38-58N 143-32-20E, 52-40-21N 143-30-14E,
52-45-21N 143-29-03E, 52-47-30N 143-29-49E,
52-47-18N 143-32-42E, 52-46-06N 143-37-42E,
52-39-34N 143-39-13E.
FOUR MILE BERTH REQUESTED.
2. CANCEL HYDROPAC 1715/15(93), VESSEL ASSISTED.
3. CANCEL THIS MSG 01 JUL 15.
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.
- Seismic survey
- A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
- Towed array / streamer
- Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
- Tow / towing
- A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
- 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.
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · cable & pipeline work
39 within 180 nm since 2001 · 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.
- Seismic survey 09 oct thru 09 dec by M/V geophysic towing 1500 meter long cable in area bound by 51-12-28N…2016-10-06
- Cable repair operations 02 aug thru 20 sep vicinity of trackline joining 52-12-41N 141-31-24E, 52-12-44N…2016-07-29
- Seismic survey in progress until 01 aug by M/V hai yang shi you 718 towing 3.3 mile long cable in area bound…2016-07-11
- Seismic survey in progress until 01 aug by M/V hai yang shi you 718 towing 3.3 mile long cable in area bound…2016-07-08
- Seismic survey 01 thru 31 jul by M/V hai yang shi you 718 in area bound by 51-28-09N 143-29-07E, 51-34-55N…2016-06-30
- Seismic survey 15 aug thru 15 sep by M/V diabaz towing 1200 meter long cable in area bound by 51-20-35N…2015-08-13
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
- 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 · 76.1 nm
- Wave rider buoy established in 51-22.54N 144-14.17ENav aids · 84.1 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 · 94.2 nm
Worldwide in the collected sources
23 cable & pipeline work listed in force · see all
Record snapshot 2026-10-03 18:21Z; source collection times vary.
Cable ops
Cable laying, pipeline and seismic operations. All current cable & pipeline work →
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.