Surveys
Underwater operations are underway off Brazil near 22-25.32S 039-56.55W until September 24 by the vessel Siem Pilot, which requests a wide berth.
South Atlantic · Brazil · HYDROLANT 1844/26
- issued
- 2026-09-17 01:36Z
- status
- cancelled 2026-09-17 14:30Z (dropped from inforce)
- self-cancels
- 2026-09-24 03:59Z
- sea
- South Atlantic Ocean
- position
- -22.422, -39.943
- vessel
- M/V SIEM PILOT · 2 messages
- source
- nga_inforce · first seen 2026-09-18 06:18Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 240259Z SEP BY M/V SIEM PILOT IN 22-25.32S 039-56.55W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 240359Z SEP 26.
This area · survey operations
770 within 180 nm since 2000 · 47 in the last 12 months · 2 in force now
00
05
10
15
20
25
26
- Underwater operations 0800Z to 1700Z daily 17 sep thru 01 oct by M/V top weather and M/V comando b in…2026-09-17
- Underwater operations 0800Z to 1800Z daily 17 sep thru 01 oct by M/V fj iris and M/V comando b in 20-23.72S…2026-09-17
- Underwater operations 0800Z to 1800Z daily until 25 sep by M/V altair sky and M/V comando b in 20-23.02S…2026-09-14
- Underwater operations 0800Z to 1800Z daily until 25 sep by M/V somnium australis and M/V comando b in…2026-09-14
- Underwater operations 0800Z to 1800Z daily until 28 sep by M/V comando b and M/V shandong fu xin in…2026-09-14
- Underwater operations 0800Z to 1800Z daily 13 thru 27 sep by M/V comando b and M/V ionic smyrni in 20-23.05S…2026-09-12
Season · when survey operations happen here
J
F
M
A
M
J
J
A
S
O
N
D
month of issue, all years in the archive
Nearby now · within 120 nm
- Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 26.4 nm
- Underwater operations in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 31 nm
- RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 65.8 nm
Worldwide now
52 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.