Surveys
Underwater operations 1000Z to 2000Z daily 07 thru 22 may by M/V open seas I in 20-54.37S 040-15.43W
Western South Atlantic · Brazil · HYDROLANT 999/23
- issued
- 2023-05-08 08:04Z
- status
- cancelled 2023-05-22 21:00Z (archive)
- self-cancels
- 2023-05-22 21:00Z
- authority
- NAVAREA V COASTAL 230/23 080320Z MAY 23.
- sea
- South Atlantic Ocean
- position
- -20.906, -40.257
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL. DNC 01. 1. UNDERWATER OPERATIONS 1000Z TO 2000Z DAILY 07 THRU 22 MAY BY M/V OPEN SEAS I IN 20-54.37S 040-15.43W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 222100Z MAY 23.
Activity windows · 16 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-05-07 10:00Z | 2023-05-07 20:00Z | — | 10 h |
| 2023-05-08 10:00Z | 2023-05-08 20:00Z | — | 10 h |
| 2023-05-09 10:00Z | 2023-05-09 20:00Z | — | 10 h |
| 2023-05-10 10:00Z | 2023-05-10 20:00Z | — | 10 h |
| 2023-05-11 10:00Z | 2023-05-11 20:00Z | — | 10 h |
| 2023-05-12 10:00Z | 2023-05-12 20:00Z | — | 10 h |
| 2023-05-13 10:00Z | 2023-05-13 20:00Z | — | 10 h |
| 2023-05-14 10:00Z | 2023-05-14 20:00Z | — | 10 h |
| … 8 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
584 within 180 nm since 2000 · 15 in the last 12 months · 15 in force now
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26
- 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 10 aug 26 thru 08 mar 27 by tug mce navegacao I in area bound by 22-48.38S 041-08.21W,…2026-08-09
Season · when survey operations happen here
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month of issue, all years in the archive
Nearby now · within 120 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 · 31 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 · 31.2 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 · 31.3 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 · 31.4 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 · 32 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 · 32.9 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 · 33.5 nm
- Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 46.6 nm
- Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 47.7 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 · 62.8 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 · 64 nm
- Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 66.6 nm
Worldwide now
86 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.