Surveys

Underwater operations 181500Z feb until further notice by M/V thalassa in area bound by 12-00N 023-00W,…

Eastern North Atlantic · South Atlantic · HYDROLANT 590/20

issued: 2020-02-18 05:07Z
status: cancelled 2020-03-16 19:28Z (archive)
authority: NAVAREA II 53/20 180437Z FEB 20.
sea: South Atlantic Ocean
position: -0.489, -11.925
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH ATLANTIC.
SOUTH ATLANTIC.
DNC 01.
UNDERWATER OPERATIONS 181500Z FEB UNTIL FURTHER
NOTICE BY M/V THALASSA IN AREA BOUND BY
12-00N 023-00W, 00-00S 010-00W,
00-00S 000-00W, 06-00S 000-05W,
06-00S 016-15W, 01-30N 020-00W.
WIDE BERTH REQUESTED.

This area · survey operations

2 within 180 nm since 2011 · 0 in the last 12 months · 0 in force now

Survey operations 01 may thru 15 jun by M/V le suroit along trackline joining 00-00N 010-00W, 06-00S…2011-04-27

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Cancel HYDROLANT 590/20 and this msg, operations completedcancelled by · 2020-03-16

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.