Surveys
Underwater operations 1100Z to 2100Z daily 12 thru 26 may by M/V comando b in 20-43.50S 040-09.42W
Western South Atlantic · Brazil · HYDROLANT 1045/23
- issued
- 2023-05-12 04:10Z
- status
- cancelled 2023-05-26 22:00Z (archive)
- self-cancels
- 2023-05-26 22:00Z
- authority
- NAVAREA V COASTAL 243/23 120312Z MAY 23.
- sea
- South Atlantic Ocean
- position
- -20.725, -40.157
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL. DNC 01. 1. UNDERWATER OPERATIONS 1100Z TO 2100Z DAILY 12 THRU 26 MAY BY M/V COMANDO B IN 20-43.50S 040-09.42W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 262200Z MAY 23.
Activity windows · 15 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-05-12 11:00Z | 2023-05-12 21:00Z | — | 10 h |
| 2023-05-13 11:00Z | 2023-05-13 21:00Z | — | 10 h |
| 2023-05-14 11:00Z | 2023-05-14 21:00Z | — | 10 h |
| 2023-05-15 11:00Z | 2023-05-15 21:00Z | — | 10 h |
| 2023-05-16 11:00Z | 2023-05-16 21:00Z | — | 10 h |
| 2023-05-17 11:00Z | 2023-05-17 21:00Z | — | 10 h |
| 2023-05-18 11:00Z | 2023-05-18 21:00Z | — | 10 h |
| 2023-05-19 11:00Z | 2023-05-19 21:00Z | — | 10 h |
| … 7 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
578 within 180 nm since 2000 · 15 in the last 12 months · 15 in force now
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05
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15
20
25
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 · 19.6 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 · 19.8 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 · 20 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 · 20.2 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 · 20.5 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 · 21.4 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 · 21.9 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 · 51 nm
- Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 57.4 nm
- Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 59.9 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 · 76.2 nm
- Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 78.8 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.