Surveys
Underwater operations 140259Z to 160259Z mar by M/V nhi sirius in area within five miles 24-36.6S 046-41.0W
Western South Atlantic · Brazil-south Coast · HYDROLANT 817/19
- issued
- 2019-03-14 13:43Z
- status
- cancelled 2019-03-16 03:59Z (archive)
- self-cancels
- 2019-03-16 03:59Z
- cancels
- HYDROLANT 807/19
- authority
- NAVAREA V COASTAL S 227/19 141316Z MAR 19.
- sea
- South Atlantic Ocean
- position
- -24.610, -46.683
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-SOUTH COAST. DNC 01. 1. UNDERWATER OPERATIONS 140259Z TO 160259Z MAR BY M/V NHI SIRIUS IN AREA WITHIN FIVE MILES 24-36.6S 046-41.0W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 807/19. 3. CANCEL THIS MSG 160359Z MAR 19.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2019-03-14 02:59Z | 2019-03-16 02:59Z | — | 48 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
237 within 180 nm since 1999 · 2 in the last 12 months · 1 in force now
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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 0500Z to 2000Z daily 16 thru 25 apr by M/V double diamond and M/V novo estado in…2024-04-16
- 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
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
- Laje da conceicao light 24-14.18S 046-41.46W unlit until 24 sepNav aids · 22.4 nm
- Odas buoy established in 24-06.36S 045-38.78WNav aids · 64.3 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.