Surveys

Survey operations in progress until 12 jul by M/V sw diamond in area bound by 21-05.87S 039-55.50W,…

Western South Atlantic · Brazil-southeast Coast · HYDROLANT 1798/21

issued: 2021-07-08 00:44Z
status: cancelled 2021-07-13 00:01Z (archive)
authority: NAVAREA V COASTAL E 494/21 080037Z JUL 21.
sea: South Atlantic Ocean
position: -21.302, -40.021
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-SOUTHEAST COAST.
DNC 01.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 12 JUL BY
   M/V SW DIAMOND IN AREA BOUND BY
   21-05.87S 039-55.50W, 21-07.33S 039-52.42W,
   21-23.55S 039-52.67W, 21-26.17S 039-54.90W,
   21-26.17S 039-56.33W, 21-30.00S 039-59.50W,
   21-29.05S 040-06.43W, 21-29.00S 040-09.00W,
   21-26.50S 040-09.00W, 21-23.67S 040-11.83W,
   21-22.50S 040-12.00W, 21-19.83S 040-12.67W,
   21-18.17S 040-11.83W, 21-16.17S 040-08.33W,
   21-13.33S 040-08.33W, 21-11.33S 040-05.50W,
   21-09.00S 040-05.33W, 21-08.00S 040-04.50W,
   21-05.83S 040-01.50W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 13 JUL 21.

This area · survey operations

608 within 180 nm since 2000 · 24 in the last 12 months · 15 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Nearby now · within 120 nm

Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 42.6 nm
Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 52.8 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 · 54.7 nm
Underwater operations 1100Z to 2100Z daily 13 thru 22 aug by M/V comando b and M/V am kirti in 20-23.90S…Surveys · 54.8 nm
Underwater operations 1100Z to 2100Z daily 12 thru 21 aug by M/V comando b and M/V faneromeni in 20-23.67S…Surveys · 55 nm
Underwater operations 0800Z to 1800Z daily 08 thru 22 aug by M/V marsanne and M/V comando b in 20-23.57S…Surveys · 55.1 nm
Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 55.1 nm
Underwater operations 1100Z to 2100Z daily 15 thru 29 aug by M/V comando b and M/V rosco banyan in 20-23.37S…Surveys · 55.5 nm
Underwater operations 0800Z to 1800Z daily 11 thru 25 aug by M/V comando b and M/V faneromeni in 20-23.00S…Surveys · 55.6 nm
Underwater operations in progress until 27 aug by M/V navios felix and M/V comando b in 20-22.12S 040-08.38WSurveys · 56.4 nm
Underwater operations 0800Z to 1800Z daily 02 thru 16 aug by M/V comando b and M/V royal topaz in 20-21.62S…Surveys · 56.9 nm
Survey operations in progress until 09 jul 27 by M/V bgp dragon towing 250 meter long cable in area bound by…Surveys · 58.3 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.