Surveys

Survey operations in progress until 05 sep by M/V professor logachev towing 4500 meter cable along trackline…

Kara Sea · HYDROARC 143/20

What this record establishes

Archived notice · 2020-09-06 00:01Z

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 XX 90/20 051730Z AUG 20.. Issued 2020-08-11 10:24Z. 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 the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Current notices and reporting history in the Kara Sea →

issued: 2020-08-11 10:24Z
status: Archived notice
authority: NAVAREA XX 90/20 051730Z AUG 20.
NAVAREA: NAVAREA XX · named as the source of this relay
sea: Kara Sea
position: 78.171, 79.749
vessel: M/V PROFESSOR LOGACHEV · 13 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

ARCTIC.
KARA SEA.
RUSSIA.
DNC 22, DNC 27.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 05 SEP
   BY M/V PROFESSOR LOGACHEV TOWING 4500 METER
   CABLE ALONG TRACKLINE JOINING
   69-12.70N 035-06.62E,72-56.00N 045-16.00E,
   77-27.60N 055-00.00E, 78-00.00N 059-00.00E,
   80-00.00N 070-00.00E, 81-30.00N 073-00.00E,
   81-39.00N 095-00.00E, 77-20.00N 116-00.00E,
   76-47.00N 125-30.00E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 06 SEP 20.

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.
Track line joining: Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · survey operations

9 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.

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

55 survey operations listed in force · see all

Record snapshot 2026-10-01 10:31Z; 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.