Surveys
Underwater operations are scheduled daily 0800Z to 1800Z from 13 through 27 September by Comando B and Ionic Smyrni off Brazil at 20-23.05S 040-09.88W, wide berth requested.
South Atlantic · Brazil · HYDROLANT 1809/26
- issued
- 2026-09-12 14:46Z
- status
- cancelled 2026-09-14 15:15Z (dropped from inforce)
- self-cancels
- 2026-09-27 19:00Z
- sea
- South Atlantic Ocean
- position
- -20.384, -40.165
- vessels
- M/V COMANDO B · 69 messagesM/V IONIC SMYRNI
- source
- nga_inforce · first seen 2026-09-14 20:17Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. UNDERWATER OPERATIONS 0800Z TO 1800Z DAILY 13 THRU 27 SEP BY M/V COMANDO B AND M/V IONIC SMYRNI IN 20-23.05S 040-09.88W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 271900Z SEP 26.
Activity windows · 15 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2026-09-13 08:00Z | 2026-09-13 18:00Z | — | 10 h |
| 2026-09-14 08:00Z | 2026-09-14 18:00Z | — | 10 h |
| 2026-09-15 08:00Z | 2026-09-15 18:00Z | — | 10 h |
| 2026-09-16 08:00Z | 2026-09-16 18:00Z | — | 10 h |
| 2026-09-17 08:00Z | 2026-09-17 18:00Z | — | 10 h |
| 2026-09-18 08:00Z | 2026-09-18 18:00Z | — | 10 h |
| 2026-09-19 08:00Z | 2026-09-19 18:00Z | — | 10 h |
| 2026-09-20 08:00Z | 2026-09-20 18:00Z | — | 10 h |
| … 7 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
583 within 180 nm since 2000 · 44 in the last 12 months · 3 in force now
00
05
10
15
20
25
26
- Underwater operations 0800Z to 1800Z daily until 25 sep by M/V altair sky and M/V comando b in 20-23.02S…2026-09-14
- Underwater operations 0800Z to 1800Z daily until 25 sep by M/V somnium australis and M/V comando b in…2026-09-14
- Underwater operations 0800Z to 1800Z daily until 28 sep by M/V comando b and M/V shandong fu xin in…2026-09-14
- Underwater operations 0800Z to 1800Z daily 13 thru 27 sep by M/V comando b and M/V calypso in 20-23.18S…2026-09-12
- Survey operations in progress until 030300Z nov by M/V fugro vaquita and an unmanned vessel along trackline…2026-09-12
- Survey operations in progress until 10 nov 27 by M/V rem saltire in area bound by 21-39.40S 039-49.11W,…2026-09-11
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
- Foul ground until 06 dec 27 in area bound by 19-53.87S 039-59.68W, 19-54.15S 039-59.27W, 19-53.08S…Wrecks · 31.3 nm
- RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 111.3 nm
- Survey operations in progress until 10 nov 27 by M/V rem saltire in area bound by 21-39.40S 039-49.11W,…Surveys · 114.6 nm
Worldwide now
56 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.