Surveys

Underwater operations 17 thru 22 mar by M/V yokosuka with submersible in areas between: a. 31-00N 34-00N and…

Western North Pacific · Japan · Nampo Shoto · HYDROPAC 812/11

issued: 2011-03-16 08:29Z
status: cancelled 2011-03-23 00:01Z (archive)
authority: NAVAREA XI 148/11 160747Z MAR 11.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
JAPAN.
NAMPO SHOTO.
1. UNDERWATER OPERATIONS 17 THRU 22 MAR BY M/V YOKOSUKA
   WITH SUBMERSIBLE IN AREAS BETWEEN:
   A. 31-00N 34-00N AND 140-30E 143-00E.
   B. 28-00N 30-00N AND 142-00E 143-30E.
   C. 35-05N 34-00N AND 138-50E 138-00E.
2. CANCEL THIS MSG 23 MAR.

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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.