Surveys
Survey operations 251200Z mar to 031900Z apr by M/V nhi sirius in area bound by 25-25.10S 047-52.30W,…
Western South Atlantic · Brazil-south Coast · HYDROLANT 935/19
- issued
- 2019-03-25 03:23Z
- status
- cancelled 2019-04-01 21:52Z (archive)
- self-cancels
- 2019-04-03 20:00Z
- authority
- NAVAREA V COASTAL S 270/19 250054Z MAR 19.
- sea
- South Atlantic Ocean
- position
- -25.707, -48.136
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-SOUTH COAST. DNC 01. 1. SURVEY OPERATIONS 251200Z MAR TO 031900Z APR BY M/V NHI SIRIUS IN AREA BOUND BY 25-25.10S 047-52.30W, 25-55.00S 047-52.30W, 25-54.96S 048-33.17W, 25-51.28S 048-30.66W, 25-42.31S 048-27.03W, 25-37.21S 048-22.62W, 25-37.92S 048-20.02W, 25-37.06S 048-16.24W, 25-35.59S 048-15.95W, 25-32.97S 048-11.66W, 25-25.12S 048-09.54W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 032000Z APR 19.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2019-03-25 12:00Z | 2019-04-03 19:00Z | — | 223 h |
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
188 within 180 nm since 1999 · 2 in the last 12 months · 1 in force now
99
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
- Scientific bouy, yellow, fl y 20 sec established in 27-24.38S 047-15.92W2026-02-27
- Underwater operations 1100Z to 2000Z daily 06 apr thru 05 may in 24-07.11S 046-08.76W2024-04-06
- Survey operations in progress until 30 apr by M/V ramform victory towing ten 8800 meter long cables in area…2024-04-03
- Survey operations in progress until 31 mar by M/V ramform victory towing ten 8800 meter long cables in area…2024-03-07
- Underwater operations 1100Z to 2000Z daily 28 feb thru 26 mar by M/V big john VI, M/V rodrigo neto I and M/V…2024-02-28
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
Timeline
Nearby now · within 120 nm
- Scientific bouy, yellow, fl y 20 sec established in 27-24.38S 047-15.92WSurveys · 112.2 nm
- Ponta da galheta light 27-34.55S 048-24.99W unlit until 31 augNav aids · 113.2 nm
- Laje da conceicao light 24-14.18S 046-41.46W unlit until 24 sepNav aids · 118.3 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.