Surveys
Underwater operations 0900Z to 2000Z daily 23 sep thru 07 oct along trackline joining 04-52.52S 036-22.30W,…
Brazil-north Coast · HYDROLANT 1517/11
- issued
- 2011-09-20 01:04Z
- status
- cancelled 2011-10-07 21:00Z (archive)
- self-cancels
- 2011-10-07 21:00Z
- authority
- NAVAREA V N 786/11 200050Z SEP 11.
- sea
- South Atlantic Ocean
- position
- -4.876, -36.373
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
BRAZIL-NORTH COAST. 1. UNDERWATER OPERATIONS 0900Z TO 2000Z DAILY 23 SEP THRU 07 OCT ALONG TRACKLINE JOINING 04-52.52S 036-22.30W, 04-52.52S 036-22.32W, 04-52.60S 036-22.43W. 2. CANCEL THIS MSG 072100Z OCT.
Activity windows · 15 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2011-09-23 09:00Z | 2011-09-23 20:00Z | — | 11 h |
| 2011-09-24 09:00Z | 2011-09-24 20:00Z | — | 11 h |
| 2011-09-25 09:00Z | 2011-09-25 20:00Z | — | 11 h |
| 2011-09-26 09:00Z | 2011-09-26 20:00Z | — | 11 h |
| 2011-09-27 09:00Z | 2011-09-27 20:00Z | — | 11 h |
| 2011-09-28 09:00Z | 2011-09-28 20:00Z | — | 11 h |
| 2011-09-29 09:00Z | 2011-09-29 20:00Z | — | 11 h |
| 2011-09-30 09:00Z | 2011-09-30 20:00Z | — | 11 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
90 within 180 nm since 1999 · 0 in the last 12 months · 0 in force now
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00
05
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24
- Survey operations in progress until 241000Z apr by M/V taurus in area bound by 06-56.53S 034-49.48W,…2024-03-16
- Survey operations in progress until 092100Z mar by M/V taurus in area bound by 06-50.45S 034-45.38W,…2024-03-05
- Survey operations in progress until 182300Z may in areas bound by: a. 02-56.00S 038-00.20W, 02-56.00S…2023-05-18
- Underwater operations 0800Z to 2100Z daily 05 sep thru 05 mar 23 by M/V paracuru in 04-52.42S 036-22.45W2022-09-05
- Underwater operations 1100Z to 1900Z daily 15 thru 22 jun by M/V texas and M/V seamaster I in 05-42.08S…2021-06-14
- Underwater operations 1100Z to 1900Z daily 01 thru 06 jun by M/V texas and M/V seamaster I in 05-42.08S…2021-05-31
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.