Surveys
Survey operations 24 nov thru 08 dec by M/V polarcus naila towing 12 6500 meter long cables in area bound by…
Western South Atlantic · Brazil-southeast Coast · HYDROLANT 3675/20
- issued
- 2020-11-26 01:44Z
- status
- cancelled 2020-12-09 00:01Z (archive)
- cancels
- HYDROLANT 3638/20
- authority
- NAVAREA V COASTAL E 862/20 260140Z NOV 20.
- sea
- South Atlantic Ocean
- position
- -22.430, -40.066
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-SOUTHEAST COAST. DNC 01. 1. SURVEY OPERATIONS 24 NOV THRU 08 DEC BY M/V POLARCUS NAILA TOWING 12 6500 METER LONG CABLES IN AREA BOUND BY 22-31S 039-47W, 22-48S 039-59W, 22-34S 040-24W, 22-19S 040-23W, 22-08S 040-14W, 22-11S 040-06W, 22-08S 039-59W, 22-16S 039-42W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 3638/20. 3. CANCEL THIS MSG 09 DEC 20.
This area · survey operations
746 within 180 nm since 2000 · 25 in the last 12 months · 15 in force now
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- Underwater operations 0800Z to 1800Z daily 21 aug thru 04 sep by M/V capetan vassilis II and M/V comando b…2026-08-20
- Underwater operations in progress until 280259Z aug by M/V siem pilot in 24-35.02S 042-15.37W2026-08-19
- Underwater operations 1100Z to 2100Z daily 20 aug thru 03 sep by M/V charlie and M/V comando b in 20-24.27S…2026-08-19
- Underwater operations 1100Z to 2100Z daily 20 aug thru 03 sep by M/V comando b and M/V linden trader in…2026-08-19
- Underwater operations 1100Z to 2100Z daily 20 aug thru 03 sep by M/V hui an and M/V comando b in 20-23.17S…2026-08-19
- Underwater operations 0800Z to 1800Z daily until 28 aug by M/V spar aries and M/V comando b in 20-48.85S…2026-08-18
Season · when survey operations happen here
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month of issue, all years in the archive
Timeline
Nearby now · within 120 nm
- Survey operations in progress until 09 jul 27 by M/V bgp dragon towing 250 meter long cable in area bound by…Surveys · 9.7 nm
- Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 19.6 nm
- Underwater operations in progress until 170259Z aug in 22-22.48S 040-25.05WSurveys · 19.8 nm
- Underwater operations in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 33.1 nm
- Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 49.6 nm
- Underwater operations in progress until 312300Z aug by M/V fugro vaquita in area bound by 21-35.43S…Surveys · 50.3 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 · 54.8 nm
- RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 59.6 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 · 61.3 nm
- Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 63.4 nm
- Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 83.7 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.