Surveys
Survey operations in progress until 23 mar by M/V hai yang shi you 720 towing ten 11112 meter long cables in…
Western South Atlantic · Brazil-east Coast · HYDROLANT 741/21
- issued
- 2021-03-16 00:26Z
- status
- cancelled 2021-03-23 06:16Z (archive)
- cancels
- HYDROLANT 677/21
- authority
- NAVAREA V 116/21 160007Z MAR 21.
- position
- -20.413, -39.045
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-EAST COAST. DNC 01. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 23 MAR BY M/V HAI YANG SHI YOU 720 TOWING TEN 11112 METER LONG CABLES IN AREA BOUND BY 20-01S 039-07W, 20-04S 038-50W, 20-49S 038-59W, 20-46S 039-15W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 677/21. 3. CANCEL THIS MSG 24 MAR 21.
This area · survey operations
553 within 180 nm since 2000 · 14 in the last 12 months · 14 in force now
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- Underwater operations 1100Z to 2100Z daily 15 thru 29 aug by M/V comando b and M/V rosco banyan in 20-23.37S…2026-08-14
- Underwater operations 1100Z to 2100Z daily 12 thru 21 aug by M/V comando b and M/V faneromeni in 20-23.67S…2026-08-13
- Underwater operations 1100Z to 2100Z daily 13 thru 22 aug by M/V comando b and M/V am kirti in 20-23.90S…2026-08-13
- Underwater operations in progress until 27 aug by M/V navios felix and M/V comando b in 20-22.12S 040-08.38W2026-08-13
- Underwater operations 0800Z to 1800Z daily 11 thru 25 aug by M/V comando b and M/V faneromeni in 20-23.00S…2026-08-10
- Survey operations in progress until 09 jul 27 by M/V bgp dragon towing 250 meter long cable in area bound by…2026-08-08
Season · when survey operations happen here
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month of issue, all years in the archive
Timeline
- Survey operations 09 thru 16 mar by M/V hai yang shi you 720 towing ten 11112 meter long cables in area…cancels · 2021-03-08
- Survey operations 09 thru 16 mar by M/V hai yang shi you 720 towing ten 11112 meter long cables in area…replaced · 2021-03-08
- Survey operations in progress until 30 mar by M/V hai yang shi you 720 towing ten 11112 meter long cables in…cancelled by · 2021-03-23
Nearby now · within 120 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 · 61.3 nm
- Foul ground until 06 dec 27 in area bound by 19-53.87S 039-59.68W, 19-54.15S 039-59.27W, 19-53.08S…Wrecks · 61.5 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 · 61.7 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 · 62.1 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 · 62.2 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 · 62.6 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 · 62.8 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 · 63.8 nm
- Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 117.1 nm
Worldwide now
75 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.