Brazil's South Atlantic waters host underwater operations by M/V Comando B daily from 26 September to 10 October, and vessels should give a wide berth.
South Atlantic Ocean · HYDROLANT 1900/26
What this record establishes
Listed in force
The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.
- Source and dates
- NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-09-25 09:46Z. First collected 2026-09-25 18:17Z; last seen in collection 2026-09-25 21:02Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- South Atlantic Ocean. The parsed report position is -19.860, -39.948. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Current notices and reporting history in the South Atlantic Ocean →
Activity windows · 15 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2026-09-26 08:00Z | 2026-09-26 18:00Z | — | 10 h |
| 2026-09-27 08:00Z | 2026-09-27 18:00Z | — | 10 h |
| 2026-09-28 08:00Z | 2026-09-28 18:00Z | — | 10 h |
| 2026-09-29 08:00Z | 2026-09-29 18:00Z | — | 10 h |
| 2026-09-30 08:00Z | 2026-09-30 18:00Z | — | 10 h |
| 2026-10-01 08:00Z | 2026-10-01 18:00Z | — | 10 h |
| 2026-10-02 08:00Z | 2026-10-02 18:00Z | — | 10 h |
| 2026-10-03 08:00Z | 2026-10-03 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.
- issued
- 2026-09-25 09:46Z
- status
- Listed in force
- self-cancels
- 2026-10-10 19:00Z
- sea
- South Atlantic Ocean
- position
- -19.860, -39.948
- nearest port
- Vitoria · 35 nm
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-25 18:17Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. UNDERWATER OPERATIONS 0800Z TO 1800Z DAILY 26 SEP THRU 10 OCT BY M/V COMANDO B IN 19-51.63S 039-56.90W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 101900Z OCT 26.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
Conditions at the position · now
loading…
MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation
Collected reports in this area · survey operations
573 within 180 nm since 2000 · 51 in the last 12 months · 3 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Underwater operations 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 20-23.78S 040-09.43W2026-09-25
- Underwater operations 0800Z to 1800Z daily 22 sep thru 06 oct by M/V nord houston and M/V comando b in…2026-09-21
- Underwater operations 0800Z to 1800Z daily 21 sep thru 05 oct by M/V comando b and M/V lindsaylou in…2026-09-20
- Underwater operations 0800Z to 1800Z daily 21 sep thru 05 oct by M/V comando b and M/V emerald daishan in…2026-09-20
- Underwater operations 0800Z to 1800Z daily 21 sep thru 05 oct by M/V mds ariadne and M/V comando b in…2026-09-20
- Underwater operations 0800Z to 1800Z daily 21 sep thru 05 oct by M/V mds ariadne and M/V comando b in…2026-09-20
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-09-25 21:10Z; source collection times vary.
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.