Surveys

Underwater operations 05 thru 10 sep by M/V yokosuka with submersible in areas between: a. 28-30.0N 28-36.5N…

Western North Pacific · Japan · Nampo Shoto · HYDROPAC 2464/11

issued: 2011-09-01 08:18Z
status: cancelled 2011-09-11 00:01Z (archive)
cancels: HYDROPAC 2421/11
authority: NAVAREA XI 683/11 010737Z SEP 11.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
JAPAN.
NAMPO SHOTO.
1. UNDERWATER OPERATIONS 05 THRU 10 SEP
   BY M/V YOKOSUKA WITH SUBMERSIBLE
   IN AREAS BETWEEN:
   A. 28-30.0N 28-36.5N AND 140-38.5E 140-43.5E.
   B. 29-00.0N 31-00.0N AND 143-00.0E 145-00.0E.
2. CANCEL HYDROPAC 2421/11.
3. CANCEL THIS MSG 11 SEP.

Timeline

Underwater operations by M/V yokosuka with submersible: a. 01 thru 04 sep in area between 28-30.0N 28-36.5N…cancels · 2011-08-27
Underwater operations by M/V yokosuka with submersible: a. 01 thru 04 sep in area between 28-30.0N 28-36.5N…replaced · 2011-08-27

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

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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.