Surveys

Survey operations in progress until 09 nov by M/V sw diamond in area bound by 21-08.60S 040-06.90W,…

Western South Atlantic · Brazil-southeast Coast · HYDROLANT 2716/21

issued: 2021-11-01 20:45Z
status: cancelled 2021-11-10 00:01Z (archive)
cancels: HYDROLANT 2633/21
authority: NAVAREA V 505/21 012004Z NOV 21.
sea: South Atlantic Ocean
position: -21.303, -40.015
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 09 NOV
   BY M/V SW DIAMOND IN AREA BOUND BY
   21-08.60S 040-06.90W, 21-06.15S 040-04.70W,
   21-04.00S 040-01.50W, 21-04.00S 039-54.80W,
   21-06.30S 039-50.60W, 21-23.90S 039-50.70W,
   21-27.30S 039-53.50W, 21-27.35S 039-54.90W,
   21-31.75S 039-58.75W, 21-31.75S 040-07.50W,
   21-30.30S 040-10.10W, 21-26.30S 040-10.70W,
   21-23.50S 040-12.65W, 21-21.80S 040-12.60W,
   21-19.45S 040-13.60W, 21-18.05S 040-13.55W,
   21-16.91S 040-12.50W, 21-15.20S 040-09.50W,
   21-12.55S 040-09.45W, 21-10.15S 040-06.90W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 2633/21.
3. CANCEL THIS MSG 10 NOV 21.

This area · survey operations

606 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

Timeline

Survey operations in progress until 02 nov by sw diamond in area bound by 21-08.60S 040-06.90W, 21-06.15S…cancels · 2021-10-26
Survey operations in progress until 02 nov by sw diamond in area bound by 21-08.60S 040-06.90W, 21-06.15S…replaced · 2021-10-26

Nearby now · within 120 nm

Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 42.9 nm
Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 53.1 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 · 54.9 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 · 54.9 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 · 55.1 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 · 55.3 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 · 55.6 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 · 55.7 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 · 56.5 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 · 57 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.