Surveys
Underwater operations in 1000Z to 2000Z daily 10 thru 16 jul in 25-39.2S 042-51.6W
Western South Atlantic · HYDROLANT 1811/21
- issued
- 2021-07-09 21:21Z
- status
- cancelled 2021-07-16 21:00Z (archive)
- self-cancels
- 2021-07-16 21:00Z
- authority
- NAVAREA V 311/21 092051Z JUL 21.
- sea
- South Atlantic Ocean
- position
- -25.653, -42.860
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. DNC 01. 1. UNDERWATER OPERATIONS IN 1000Z TO 2000Z DAILY 10 THRU 16 JUL IN 25-39.2S 042-51.6W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 162100Z JUL 21.
Activity windows · 7 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2021-07-10 10:00Z | 2021-07-10 20:00Z | — | 10 h |
| 2021-07-11 10:00Z | 2021-07-11 20:00Z | — | 10 h |
| 2021-07-12 10:00Z | 2021-07-12 20:00Z | — | 10 h |
| 2021-07-13 10:00Z | 2021-07-13 20:00Z | — | 10 h |
| 2021-07-14 10:00Z | 2021-07-14 20:00Z | — | 10 h |
| 2021-07-15 10:00Z | 2021-07-15 20:00Z | — | 10 h |
| 2021-07-16 10:00Z | 2021-07-16 20:00Z | — | 10 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
573 within 180 nm since 2000 · 2 in the last 12 months · 0 in force now
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15
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
- Underwater operations in progress until 19 may in 23-04.0S 043-02.5W2024-04-21
- Survey operations 17 apr thru 08 may by M/V artemis odyssey in area bound by 25-04.49S 042-10.72W, 25-05.99S…2024-04-17
- Underwater operations 0500Z to 2000Z daily 16 thru 25 apr by M/V double diamond and M/V novo estado in…2024-04-16
- Survey operations in progress until 11 mar by M/V artemis odyssey in area bound by 25-04.49S 042-10.72W,…2024-03-02
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.