Survey operations in progress until 18 nov by M/V nikolai trubyatchinsky towing 12000 meter long cable in…
Kara Sea · HYDROARC 257/18
What this record establishes
Archived notice · 2018-11-02 12:24Z
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 XXI 48/18 050630Z OCT 18.. Issued 2018-10-05 07:51Z. 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
- Kara Sea. 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
- Survey operations 20 sep thru 18 nov by M/V nikolai trubyatchinsky towing 12000 meter long cable in area…cancelled by this notice
- Cancel HYDROARC 257/18 and this msglater cancellation notice
- issued
- 2018-10-05 07:51Z
- status
- Archived notice
- authority
- NAVAREA XXI 48/18 050630Z OCT 18.
- NAVAREA
- NAVAREA XXI · named as the source of this relay
- sea
- Kara Sea
- position
- 74.208, 57.516
- vessel
- M/V NIKOLAI TRUBYATCHINSKY · 2 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EAST SIBERIAN SEA. CHUKCHI SEA. RUSSIA. DNC 27. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 18 NOV BY M/V NIKOLAI TRUBYATCHINSKY TOWING 12000 METER LONG CABLE IN AREA BOUND BY 75-02.8N 171-17.8E, 75-00.0N 178-30.0W, 72-40.6N 180-00.0E, 72-13.2N 179-59.6E, 71-20.2N 174-24.1E, 71-20.2N 170-35.8E. EIGHT MILE BERTH REQUESTED. 2. CANCEL HYDROARC 237/18. 3. CANCEL THIS MSG 19 NOV 18.
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.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- 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.
- HYDROARC
- The U.S. long-range warning series for the Arctic Ocean.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
47 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.
- Underwater operations 05 may thru 01 aug in 73-59.48N 046-42.64E2023-05-04
- Survey operations 24 aug until further notice by M/V akvamarin in areas bound by: a. 73-34.40N 064-29.30E,…2022-08-19
- Sub-surface scientific mooring, at depth 95 meters, established until further notice in 73-15.78N 065-32.05E2022-07-25
- Survey operations in progress until 30 aug by M/V bavenit: a. in: a. 72-14.00N 064-56.50E2022-07-12
- Sub-surface scientific mooring, least depth 15 meters, established until further notice in 73-00.82N…2022-07-11
- Survey operations 08 jul until further notice M/V akvamarin towing 1000 meter long cable in area bound by…2022-07-05
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
56 survey operations listed in force · see all
Record snapshot 2026-10-02 20:16Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.