Surveys
Underwater operations in progress until 202359Z sep by M/V ile douessant along trackline joining 23-18.38S…
Western South Atlantic · Brazil-south Coast · HYDROLANT 2164/21
- issued
- 2021-08-22 16:46Z
- status
- cancelled 2021-09-21 23:59Z (archive)
- self-cancels
- 2021-09-21 23:59Z
- authority
- NAVAREA V COASTAL S 595/21 221331Z AUG 21.
- sea
- South Atlantic Ocean
- position
- -23.352, -43.487
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-SOUTH COAST. DNC 01. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 202359Z SEP BY M/V ILE DOUESSANT ALONG TRACKLINE JOINING 23-18.38S 043-29.15W, 23-19.77S 043-29.19W, 23-19.94S 043-29.20W, 23-19.96S 043-29.20W, 23-19.99S 043-29.20W, 23-20.10S 043-29.20W, 23-20.17S 043-29.20W, 23-22.32S 043-29.27W, 23-22.38S 043-29.28W, 23-23.14S 043-29.34W, 23-23.81S 043-29.36W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 212359Z SEP 21.
This area · survey operations
497 within 180 nm since 2000 · 9 in the last 12 months · 6 in force now
00
05
10
15
20
25
26
- Underwater operations 1000Z to 2000Z daily until 25 aug by vessel nomar in 24-07.27S 046-09.30W2026-08-20
- Survey operations in progress until 24 aug by M/V sea 1 dorado in area bound by 24-53.20S 042-47.12W,…2026-08-19
- Underwater operations in progress until 280259Z aug by M/V siem pilot in 24-35.02S 042-15.37W2026-08-19
- 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
- Underwater operations in progress until 170259Z aug in 22-22.48S 040-25.05W2026-08-06
- Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…2026-07-27
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
Worldwide now
84 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.