Surveys

Survey operations 18 jun thru 18 sep by M/V nikolay trubyatchinsky in area bound by 46-01-10N 142-10-44E,…

Sea of Okhotsk · HYDROPAC 1791/20

What this record establishes

Archived notice · 2020-09-03 09:23Z

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 66/20 170907Z JUN 20.. Issued 2020-06-17 09:11Z. 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
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
2020-06-17 09:11Z
status
Archived notice
authority
NAVAREA XIII 66/20 170907Z JUN 20.
NAVAREA
NAVAREA XIII · named as the source of this relay
sea
Sea of Okhotsk
position
52.182, 148.461
vessel
M/V NIKOLAY TRUBYATCHINSKY · 29 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.
DNC 24.
1. SURVEY OPERATIONS 18 JUN THRU 18 SEP
   BY M/V NIKOLAY TRUBYATCHINSKY
   IN AREA BOUND BY
   46-01-10N 142-10-44E, 45-42-43N 142-08-53E,
   44-43-59N 146-01-26E, 49-32-15N 152-46-01E,
   50-06-13N 154-33-11E, 59-01-50N 154-30-48E,
   58-47-30N 152-56-42E, 57-40-03N 152-59-42E,
   57-29-14N 145-32-06E, 56-11-35N 145-38-53E,
   55-54-24N 140-42-32E, 53-50-48N 141-12-04E,
   53-50-28N 142-15-22E, 54-30-25N 142-52-19E,
   54-00-02N 143-07-19E, 53-58-23N 144-08-10E,
   50-43-55N 144-58-48E, 50-45-43N 143-54-18E,
   50-28-42N 144-00-18E, 50-17-56N 145-05-20E,
   49-36-16N 145-23-10E, 49-25-39N 144-20-35E,
   48-40-31N 144-51-11E, 49-04-04N 142-57-18E.
   SIX MILE BERTH REQUESTED.
2. CANCEL THIS MSG 19 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.
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

79 within 180 nm since 2003 · 1 in the last 12 months · 1 listed in force now

03
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

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 2026-09-30 13:17Z; 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.