Surveys
Underwater operations 1200Z to 1700Z daily 15 thru 30 apr by M/V future and M/V open seas I in 20-22.10S…
Western South Atlantic · Brazil · HYDROLANT 797/24
- issued
- 2024-04-15 14:15Z
- status
- cancelled 2024-04-30 18:00Z (archive)
- self-cancels
- 2024-04-30 18:00Z
- authority
- NAVAREA V COASTAL 229/24 151231Z APR 24.
- sea
- South Atlantic Ocean
- position
- -20.368, -40.146
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL. DNC 01. 1. UNDERWATER OPERATIONS 1200Z TO 1700Z DAILY 15 THRU 30 APR BY M/V FUTURE AND M/V OPEN SEAS I IN 20-22.10S 040-08.75W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 301800Z APR 24.
Activity windows · 16 in the telegram
| opens (UTC) | closes (UTC) | local (UTC) | length |
|---|---|---|---|
| 2024-04-15 12:00Z | 2024-04-15 17:00Z | Apr 15, 12:00 → Apr 15, 17:00 | 5 h |
| 2024-04-16 12:00Z | 2024-04-16 17:00Z | Apr 16, 12:00 → Apr 16, 17:00 | 5 h |
| 2024-04-17 12:00Z | 2024-04-17 17:00Z | Apr 17, 12:00 → Apr 17, 17:00 | 5 h |
| 2024-04-18 12:00Z | 2024-04-18 17:00Z | Apr 18, 12:00 → Apr 18, 17:00 | 5 h |
| 2024-04-19 12:00Z | 2024-04-19 17:00Z | Apr 19, 12:00 → Apr 19, 17:00 | 5 h |
| 2024-04-20 12:00Z | 2024-04-20 17:00Z | Apr 20, 12:00 → Apr 20, 17:00 | 5 h |
| 2024-04-21 12:00Z | 2024-04-21 17:00Z | Apr 21, 12:00 → Apr 21, 17:00 | 5 h |
| 2024-04-22 12:00Z | 2024-04-22 17:00Z | Apr 22, 12:00 → Apr 22, 17:00 | 5 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
552 within 180 nm since 2002 · 15 in the last 12 months · 15 in force now
02
05
10
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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M
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M
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month of issue, all years in the archive
Nearby now · within 120 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 · 0.3 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 · 0.9 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 · 0.9 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 · 1.5 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 · 1.7 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 · 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 · 2.2 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 · 30.1 nm
- Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 73 nm
- Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 79.2 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 · 95.8 nm
- Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 98.8 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.