Surveys

Survey operations in progress until further notice by M/V ridley thomas in area bound by 23-12S 042-18E,…

HYDROPAC 798/09

issued: 2009-04-21 19:59Z
status: cancelled 2009-04-21 19:59Z (archive)
cancels: HYDROPAC 771/09
authority: NAVAREA VII 81/09 211931Z APR 09.
position: -23.404, 42.784
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE
   BY M/V RIDLEY THOMAS IN AREA BOUND BY
   23-12S 042-18E, 23-12S 043-18E,
   23-30S 042-18E, 23-42S 043-24E.
   1.5 MILE BERTH REQUESTED.
2. CANCEL HYDROPAC 771/09.

This area · survey operations

1 within 180 nm since 2009 · 0 in the last 12 months · 0 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Survey operations in progress until further notice by M/V ridley thomas in area bound by 12-26S 041-55E,…cancels · 2009-04-17
Survey operations in progress until further notice by M/V ridley thomas in area bound by 12-26S 041-55E,…replaced · 2009-04-17
Survey operations in progress until further notice by M/V ridley thomas along trackline joining 24-51S…cancelled by · 2009-04-28

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

73 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.