Cable ops

Seismic survey 140001Z sep to 150001Z oct by M/V zefir 1 towing 8000 meter long cable in area bound by…

East Siberian Sea · HYDROARC 75/10

What this record establishes

Archived notice · 2010-10-15 01:01Z

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 XXI 5/10 071335Z SEP 10.. Issued 2010-09-09 12:11Z. 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: East Siberian 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.

Current notices and reporting history in the East Siberian Sea →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2010-09-14 00:01Z	2010-10-15 00:01Z	—	744 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued: 2010-09-09 12:11Z
status: Archived notice
self-cancels: 2010-10-15 01:01Z
authority: NAVAREA XXI 5/10 071335Z SEP 10.
NAVAREA: NAVAREA XXI · named as the source of this relay
sea: East Siberian Sea
position: 73.217, 165.569
vessel: M/V ZEFIR 1 · 3 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

ARCTIC.
EAST SIBERIAN SEA.
1. SEISMIC SURVEY 140001Z SEP TO 150001Z OCT
   BY M/V ZEFIR 1 TOWING 8000 METER
   LONG CABLE IN AREA BOUND BY
   76-39N 157-48E, 74-33N 176-12E,
   70-08N 178-35E, 70-26N 164-40E,
   72-45N 153-18E, 75-20N 152-54E.
   FIVE MILE BERTH REQUESTED.
2. CANCEL THIS MSG 150101Z OCT.

Reading this warning

Seismic survey: A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
Date-time group (DTG): A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
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 · cable & pipeline work

4 within 180 nm since 2010 · 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

23 cable & pipeline work listed in force · see all

Record snapshot 2026-10-02 18:13Z; 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.