Surveys
Underwater operations 0800Z to 1800Z daily 22 aug thru 05 sep by M/V comando b and M/V true chariot in…
South Atlantic · Brazil · HYDROLANT 1639/26
- issued
- 2026-08-21 10:42Z
- status
- cancelled 2026-08-19 18:30Z (dropped from inforce)
- self-cancels
- 2026-09-05 19:00Z
- sea
- South Atlantic Ocean
- position
- -20.314, -40.136
- source
- nga_inforce · first seen 2026-08-23 13:17Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. UNDERWATER OPERATIONS 0800Z TO 1800Z DAILY 22 AUG THRU 05 SEP BY M/V COMANDO B AND M/V TRUE CHARIOT IN 20-18.87S 040-08.17W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 051900Z SEP 26.
Activity windows · 15 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2026-08-22 08:00Z | 2026-08-22 18:00Z | — | 10 h |
| 2026-08-23 08:00Z | 2026-08-23 18:00Z | — | 10 h |
| 2026-08-24 08:00Z | 2026-08-24 18:00Z | — | 10 h |
| 2026-08-25 08:00Z | 2026-08-25 18:00Z | — | 10 h |
| 2026-08-26 08:00Z | 2026-08-26 18:00Z | — | 10 h |
| 2026-08-27 08:00Z | 2026-08-27 18:00Z | — | 10 h |
| 2026-08-28 08:00Z | 2026-08-28 18:00Z | — | 10 h |
| 2026-08-29 08:00Z | 2026-08-29 18:00Z | — | 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
558 within 180 nm since 2000 · 25 in the last 12 months · 12 in force now
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05
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15
20
25
26
- 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 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
- Underwater operations 0800Z to 1800Z daily until 29 aug by M/V comando b and M/V am kirti in 20-19.03S…2026-08-18
Season · when survey operations happen here
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F
M
A
M
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J
A
S
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N
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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 · 3.3 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 · 4.2 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 · 4.7 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 · 5 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 · 5.1 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 · 5.2 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 · 26.8 nm
- Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 75.9 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 · 99 nm
- Underwater operations in progress until 312300Z aug by M/V fugro vaquita in area bound by 21-35.43S…Surveys · 106 nm
- RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 115.7 nm
- Survey operations in progress until 09 jul 27 by M/V bgp dragon towing 250 meter long cable in area bound by…Surveys · 117.8 nm
Worldwide now
77 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.