Surveys
Underwater operations 0800Z to 2300Z daily 20 thru 30 oct by M/V lorelay in area within 0.5 miles of…
Western South Atlantic · Brazil-south Coast · HYDROLANT 3369/17
- issued
- 2017-10-20 00:55Z
- status
- cancelled 2017-10-31 00:01Z (archive)
- self-cancels
- 2017-10-31 00:01Z
- authority
- NAVAREA V COASTAL S 860/17 200039Z OCT 17.
- sea
- South Atlantic Ocean
- position
- -23.032, -42.662 · r 0.5 nm
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-SOUTH COAST. DNC 01. 1. UNDERWATER OPERATIONS 0800Z TO 2300Z DAILY 20 THRU 30 OCT BY M/V LORELAY IN AREA WITHIN 0.5 MILES OF 23-01.9S 042-39.7W. WIDE BERTH REQUESTED. 3. CANCEL THIS MSG 310001Z OCT 17.
Activity windows · 11 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2017-10-20 08:00Z | 2017-10-20 23:00Z | — | 15 h |
| 2017-10-21 08:00Z | 2017-10-21 23:00Z | — | 15 h |
| 2017-10-22 08:00Z | 2017-10-22 23:00Z | — | 15 h |
| 2017-10-23 08:00Z | 2017-10-23 23:00Z | — | 15 h |
| 2017-10-24 08:00Z | 2017-10-24 23:00Z | — | 15 h |
| 2017-10-25 08:00Z | 2017-10-25 23:00Z | — | 15 h |
| 2017-10-26 08:00Z | 2017-10-26 23:00Z | — | 15 h |
| 2017-10-27 08:00Z | 2017-10-27 23:00Z | — | 15 h |
| … 3 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
579 within 180 nm since 2000 · 10 in the last 12 months · 8 in force now
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20
25
26
- 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
- Survey operations in progress until 09 jul 27 by M/V bgp dragon towing 250 meter long cable in area bound by…2026-08-08
- 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
- Survey operations 10 aug 26 thru 08 mar 27 by tug mce navegacao I in area bound by 22-48.38S 041-08.21W,…Surveys · 88.1 nm
- Ponta dos meros light 23-13.57S 044-20.83W unlit until 26 sepNav aids · 93.8 nm
- Hazardous operations in progress until 060400Z jun 27 in area bound by 24-39.87S 042-29.30W, 24-39.78S…Exercises · 97.5 nm
- RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 107.2 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.