Surveys

Survey operations by M/V polarcus asima and M/V polarcus alima: a. in progress thru 12 jun in area bound by…

Sea of Okhotsk · HYDROPAC 1824/19

What this record establishes

Archived notice · 2019-06-06 10:13Z

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 55/19 040928Z JUN 19.. Issued 2019-06-04 12:33Z. 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
2019-06-04 12:33Z
status
Archived notice
authority
NAVAREA XIII 55/19 040928Z JUN 19.
NAVAREA
NAVAREA XIII · named as the source of this relay
sea
Sea of Okhotsk
position
52.775, 144.383
vessels
M/V POLARCUS ALIMA · 115 messagesM/V POLARCUS ASIMA · 48 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 BY M/V POLARCUS ASIMA AND
   M/V POLARCUS ALIMA:
   A. IN PROGRESS THRU 12 JUN IN AREA BOUND BY
      52-00-02N 144-23-22E, 53-30-00N 144-00-00E,
      53-30-00N 144-30-00E, 52-00-03N 144-52-11E.
   B. 07 JUN TO 15 JUL IN AREA BOUND BY
     53-00-00N 143-23-42E, 53-14-05N 143-16-33E,
     53-15-36N 143-25-52E, 53-00-00N 143-34-00E.
   FOUR MILE BERTH REQUESTED.
2. CANCEL HYDROPAC 1764/19.
3. CANCEL THIS MSG 16 JUL 19.

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.
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 · survey operations

139 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

50 survey operations listed in force · see all

Record snapshot 2026-09-24 23:53Z; 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.