Cable ops

Seismic survey in progress until 20 oct by M/V pacific explorer towing six 5500 meter long cables in area…

Sea of Okhotsk · HYDROPAC 2641/11

What this record establishes

Archived notice · 2011-10-03 09:28Z

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 XIII 48/11 200834Z SEP 11.. Issued 2011-09-20 09:06Z. 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
2011-09-20 09:06Z
status
Archived notice
authority
NAVAREA XIII 48/11 200834Z SEP 11.
NAVAREA
NAVAREA XIII · named as the source of this relay
sea
Sea of Okhotsk
position
51.337, 144.135
vessel
M/V PACIFIC EXPLORER · 44 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SAKHALIN-NORTHEAST COAST.
1. SEISMIC SURVEY IN PROGRESS UNTIL 20 OCT
   BY M/V PACIFIC EXPLORER TOWING SIX 5500
   METER LONG CABLES IN AREA BOUND BY
   51-11-43.16N 144-17-59.54E, 51-16-03.13N 143-55-02.33E,
   51-20-50.15N 143-51-05.25E, 51-29-51.06N 144-20-21.57E,
   51-25-42.84N 144-23-40.23E, 51-22-07.88N 144-12-29.39E,
   51-12-27.70N 144-20-14.95E.
2. CANCEL HYDROPAC 2418/11.
3. CANCEL THIS MSG 21 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.
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.
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.

All warning terms →

Collected reports in this area · cable & pipeline work

36 within 180 nm since 2001 · 0 in the last 12 months · 0 listed in force now

01
05
10
15
18

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

Worldwide in the collected sources

25 cable & pipeline work listed in force · see all

Record snapshot 2026-09-28 18:05Z; 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.