Surveys

Underwater operations 1100Z to 2100Z daily 28 aug thru 28 sep by M/V baru atria, M/V locar lh XXI, M/V locar…

Western South Atlantic · Brazil-southeast Coast · HYDROLANT 2621/19

issued: 2019-08-29 00:29Z
status: cancelled 2019-08-31 04:06Z (archive)
self-cancels: 2019-09-28 22:00Z
authority: NAVAREA V COASTAL S 893/19 281736Z AUG 19.
sea: South Atlantic Ocean
position: -22.855, -40.355 · r 2.0 nm
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-SOUTHEAST COAST.
DNC 01.
1. UNDERWATER OPERATIONS 1100Z TO 2100Z DAILY
   28 AUG THRU 28 SEP
   BY M/V BARU ATRIA, M/V LOCAR LH XXI,
   M/V LOCAR LH XXII, M/V LOCAR LH XXIV,
   M/V LH PLACIDO, M/V CBO ATLANTICO,
   M/V SANTOS SCOUT, M/V CBO GUANABARA,
   M/V CBO MANOELLA, M/V CBO BOSSA NOVA,
   M/V MAR LIMPO II, M/V ASTRO TUPI,
   M/V DANKO TIDE, M/V ASGAARD SOPHIA E
   AND M/V SAPURA ESMERALDA
   IN AREA WITHIN TWO MILES OF 22-51.28S 040-21.30W.
   TWO MILE BERTH REQUESTED.
2. CANCEL THIS MSG 282200Z SEP 19.

Activity windows · 32 in this warning

opens (UTC)	closes (UTC)	local	length
2019-08-28 11:00Z	2019-08-28 21:00Z	—	10 h
2019-08-29 11:00Z	2019-08-29 21:00Z	—	10 h
2019-08-30 11:00Z	2019-08-30 21:00Z	—	10 h
2019-08-31 11:00Z	2019-08-31 21:00Z	—	10 h
2019-09-01 11:00Z	2019-09-01 21:00Z	—	10 h
2019-09-02 11:00Z	2019-09-02 21:00Z	—	10 h
2019-09-03 11:00Z	2019-09-03 21:00Z	—	10 h
2019-09-04 11:00Z	2019-09-04 21:00Z	—	10 h
… 24 more

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

This area · survey operations

861 within 180 nm since 2000 · 26 in the last 12 months · 15 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Survey operations 2100Z to 0300Z commencing daily 30 aug thru 28 sep by M/V baru atria, M/V locar lh XXI,…cancelled by · 2019-08-31

Nearby now · within 120 nm

Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 24.9 nm
Underwater operations in progress until 170259Z aug in 22-22.48S 040-25.05WSurveys · 29 nm
Underwater operations in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 31.4 nm
Survey operations in progress until 09 jul 27 by M/V bgp dragon towing 250 meter long cable in area bound by…Surveys · 39.4 nm
Survey operations 10 aug 26 thru 08 mar 27 by tug mce navegacao I in area bound by 22-48.38S 041-08.21W,…Surveys · 40.3 nm
Underwater operations in progress until 312300Z aug by M/V fugro vaquita in area bound by 21-35.43S…Surveys · 59.4 nm
Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 60.9 nm
RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 62.3 nm
Survey operations in progress until 312200Z aug in area bound by 21-36.17S 041-00.00W, 21-36.05S 040-37.59W,…Surveys · 66.2 nm
Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 79.9 nm
Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 98.6 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.