Surveys

Underwater operations 25 feb thru 07 apr by M/V thalassa in: a. 00-00S 010-00W

South Atlantic · HYDROLANT 525/22

issued: 2022-02-22 04:20Z
status: cancelled 2022-04-08 00:01Z (archive)
authority: NAVAREA VII 114/22 220940Z FEB 22.
sea: South Atlantic Ocean
position: -6.000, -11.000
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

SOUTH ATLANTIC.
DNC 01.
1. UNDERWATER OPERATIONS 25 FEB THRU 07 APR BY
   M/V THALASSA IN:
   A. 00-00S 010-00W.
   B. 06-00S 010-00W.
   C. 10-00S 010-00W.
   D. 20-00S 010-00W.
   E. 00-00S 003-00W.
   F. 00-00S 023-00W.
   TWO MILE BERTH REQUESTED.
2. CANCEL THIS MSG 08 APR 22.

This area · survey operations

3 within 180 nm since 2002 · 0 in the last 12 months · 0 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

86 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.