Surveys

Underwater operations 14 aug thru 04 sep in area bound by 43-00N 148-00E, 45-05N 148-00E, 45-05N 151-00E,…

North Pacific Ocean · HYDROPAC 2578/19

What this record establishes

Archived notice · 2019-09-05 00:01Z

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 XIII 99/19 100903Z AUG 19.. Issued 2019-08-10 09:44Z. 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
North Pacific Ocean. 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 North Pacific Ocean →

issued
2019-08-10 09:44Z
status
Archived notice
authority
NAVAREA XIII 99/19 100903Z AUG 19.
NAVAREA
NAVAREA XIII · named as the source of this relay
sea
North Pacific Ocean
position
44.042, 149.500
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
JAPAN.
DNC 12.
1. UNDERWATER OPERATIONS 14 AUG THRU 04 SEP IN
   AREA BOUND BY
   43-00N 148-00E, 45-05N 148-00E,
   45-05N 151-00E, 43-00N 151-00E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 05 SEP 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.
Underwater operations
Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
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

3 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

Worldwide in the collected sources

50 survey operations listed in force · see all

Record snapshot 2026-09-24 21:37Z; 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.