Surveys
Underwater operations 1000Z to 2000Z daily 18 thru 30 jul by M/V ostreiro in 25-01.30S 042-40.05W
Western South Atlantic · HYDROLANT 1897/21
- issued
- 2021-07-19 21:57Z
- status
- cancelled 2021-07-30 21:00Z (archive)
- self-cancels
- 2021-07-30 21:00Z
- authority
- NAVAREA V 327/21 192120Z JUL 21.
- sea
- South Atlantic Ocean
- position
- -25.022, -42.667
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. DNC 01. 1. UNDERWATER OPERATIONS 1000Z TO 2000Z DAILY 18 THRU 30 JUL BY M/V OSTREIRO IN 25-01.30S 042-40.05W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 302100Z JUL 21.
Activity windows · 13 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2021-07-18 10:00Z | 2021-07-18 20:00Z | — | 10 h |
| 2021-07-19 10:00Z | 2021-07-19 20:00Z | — | 10 h |
| 2021-07-20 10:00Z | 2021-07-20 20:00Z | — | 10 h |
| 2021-07-21 10:00Z | 2021-07-21 20:00Z | — | 10 h |
| 2021-07-22 10:00Z | 2021-07-22 20:00Z | — | 10 h |
| 2021-07-23 10:00Z | 2021-07-23 20:00Z | — | 10 h |
| 2021-07-24 10:00Z | 2021-07-24 20:00Z | — | 10 h |
| 2021-07-25 10:00Z | 2021-07-25 20:00Z | — | 10 h |
| … 5 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
590 within 180 nm since 2000 · 3 in the last 12 months · 1 in force now
00
05
10
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
- 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
- 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
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.