Surveys

Underwater operations 03 mar to 12 apr by M/V thalassa in: a. 06-00S 010-00W

South Atlantic · HYDROLANT 600/21

issued: 2021-03-01 10:16Z
status: cancelled 2021-04-13 00:01Z (archive)
authority: NAVAREA VII 62/21 010949Z MAR 21.
sea: South Atlantic Ocean
position: -12.000, -10.000
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

SOUTH ATLANTIC.
DNC 01.
1. UNDERWATER OPERATIONS 03 MAR TO 12 APR BY
   M/V THALASSA IN:
   A. 06-00S 010-00W.
   B. 10-00S 010-00W.
   C. 20-00S 010-00W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 13 APR 21.

This area · survey operations

2 within 180 nm since 2005 · 0 in the last 12 months · 0 in force now

Hydrographic survey in progress until 30 sep by M/V le suroit in area bound by 00-00 010-00W, 10-00S…2005-09-05

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.