Surveys

Survey operations 15 jun thru 31 oct by M/V academic nemchinov towing four 5400 meter long cables in area…

Barentsz Sea · HYDROARC 84/20

What this record establishes

Archived notice · 2020-10-04 17:35Z

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 65/20 120533Z JUN 20.. Issued 2020-06-12 05:43Z. 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
Barentsz 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

Current notices and reporting history in the Barentsz Sea →

issued
2020-06-12 05:43Z
status
Archived notice
authority
NAVAREA XX 65/20 120533Z JUN 20.
NAVAREA
NAVAREA XX · named as the source of this relay
sea
Barentsz Sea
position
69.261, 56.599
vessel
M/V ACADEMIC NEMCHINOV · 5 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BARENTS SEA.
RUSSIA.
DNC 22.
1. SURVEY OPERATIONS 15 JUN THRU 31 OCT
   BY M/V ACADEMIC NEMCHINOV TOWING FOUR
   5400 METER LONG CABLES IN AREA BOUND BY
   69-37-58N 056-24-09E, 69-23-58N 057-33-09E,
   68-53-58N 056-40-09E, 69-00-58N 055-53-03E,
   69-14-58N 055-53-27E.
   SEVEN MILE BERTH REQUESTED.
2. CANCEL THIS MSG 01 NOV 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.
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.
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

29 within 180 nm since 2014 · 0 in the last 12 months · 0 listed in force now

14
15
20
23

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

J
F
M
A
M
J
J
A
S
O
N
D

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 2026-10-01 23:00Z; 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.