Restricted

Navigation prohibited 111200Z to 171200Z apr in area bound by 51-03.30N 156-22.20E, 50-43.10N 156-52.00E,…

Sea of Okhotsk · HYDROPAC 1172/24

What this record establishes

Archived notice · 2024-04-17 13:00Z

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 33/24 111302Z APR 24.. Issued 2024-04-11 14:05Z. 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.

Current notices and reporting history in the Sea of Okhotsk →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2024-04-11 12:00Z	2024-04-17 12:00Z	—	144 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued: 2024-04-11 14:05Z
status: Archived notice
self-cancels: 2024-04-17 13:00Z
authority: NAVAREA XIII 33/24 111302Z APR 24.
NAVAREA: NAVAREA XIII · named as the source of this relay
sea: Sea of Okhotsk
position: 50.508, 155.720
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SEA OF OKHOTSK.
WESTERN NORTH PACIFIC.
KURIL ISLANDS.
DNC 24.
1. NAVIGATION PROHIBITED 111200Z TO 171200Z APR
   IN AREA BOUND BY
   51-03.30N 156-22.20E, 50-43.10N 156-52.00E,
   50-17.50N 156-18.30E, 49-48.10N 155-25.00E,
   49-59.00N 154-55.30E, 50-08.20N 154-39.20E,
   50-24.50N 154-57.30E, 50-50.00N 155-08.50E,
   51-06.40N 155-33.20E.
2. CANCEL THIS MSG 171300Z APR 24.

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.
Navigation prohibited: Ships may not enter or pass through the area, or a port is closed to traffic.
Date-time group (DTG): A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
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.
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 · restricted areas & port closures

11 within 180 nm since 2004 · 0 in the last 12 months · 0 listed in force now

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

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

2 restricted areas & port closures listed in force · see all

Record snapshot 2026-09-29 03:12Z; source collection times vary.

Restricted

Navigation prohibited, exclusion and security zones, ports closed to traffic. All current restricted areas & port closures →

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.