Surveys

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

Western North Pacific · Japan · Nampo Shoto · HYDROPAC 2421/11

issued: 2011-08-27 12:13Z
status: cancelled 2011-09-01 08:18Z (archive)
authority: NAVAREA XI 656/11 270745Z AUG 11.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
JAPAN.
NAMPO SHOTO.
1. UNDERWATER OPERATIONS BY M/V YOKOSUKA
   WITH SUBMERSIBLE:
   A. 01 THRU 04 SEP IN AREA BETWEEN
      28-30.0N 28-36.5N AND 140-38.5E 140-43.5E.
   B. 07 THRU 10 SEP IN AREA BETWEEN
      29-00.0N 31-00.0N AND 143-00.0E 145-00.0E.
2. CANCEL THIS MSG 11 SEP.

Timeline

Underwater operations 05 thru 10 sep by M/V yokosuka with submersible in areas between: a. 28-30.0N 28-36.5N…cancelled by · 2011-09-01

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

84 survey operations in force · see all

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.