Surveys

Survey operations 17 jun thru 27 sep by M/V geophysic towing 1500 meter long cable in area bound by…

Sea of Okhotsk · HYDROPAC 1786/16

What this record establishes

Archived notice · 2016-08-31 09:26Z

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 41/16 140902Z JUN 16.. Issued 2016-06-14 11:52Z. 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
2016-06-14 11:52Z
status
Archived notice
authority
NAVAREA XIII 41/16 140902Z JUN 16.
NAVAREA
NAVAREA XIII · named as the source of this relay
sea
Sea of Okhotsk
position
52.190, 143.905
vessel
M/V GEOPHYSIC · 5 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SEA OF OKHOTSK.
SAKHALIN-EAST COAST.
DNC 24.
1. SURVEY OPERATIONS 17 JUN THRU 27 SEP BY
   M/V GEOPHYSIC TOWING 1500 METER LONG CABLE
   IN AREA BOUND BY
   52-00-47.54N 143-51-10.39E, 52-05-37.95N 143-46-53.95E,
   52-16-15.13N 143-47-33.82E, 52-16-13.64N 143-52-25.14E,
   52-25-42.22N 143-53-29.33E, 52-25-39.62N 143-55-15.03E,
   52-19-20.92N 144-00-33.13E, 52-00-38.11N 143-59-15.07E.
   TWO MILE BERTH REQUESTED.
2. CANCEL THIS MSG 28 SEP 16.

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

137 within 180 nm since 2000 · 5 in the last 12 months · 2 listed in force now

00
05
10
15
20
25
26

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

56 survey operations listed in force · see all

Record snapshot 2026-10-03 17:05Z; 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.