Underwater operations 0800Z to 1800Z daily 02 thru 16 oct by M/V comando b and M/V top weather in 20-23.85S…
South Atlantic Ocean · HYDROLANT 1955/26
What this record establishes
Cancelled notice · 2026-10-01 16:15Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-10-01 13:42Z. First collected 2026-10-01 19:02Z; last seen in collection 2026-10-01 20:17Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- South Atlantic Ocean. The parsed report position is -20.398, -40.151. 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 |
|---|---|---|---|
| 2026-10-02 08:00Z | 2026-10-02 18:00Z | — | 10 h |
| 2026-10-03 08:00Z | 2026-10-03 18:00Z | — | 10 h |
| 2026-10-04 08:00Z | 2026-10-04 18:00Z | — | 10 h |
| 2026-10-05 08:00Z | 2026-10-05 18:00Z | — | 10 h |
| 2026-10-06 08:00Z | 2026-10-06 18:00Z | — | 10 h |
| 2026-10-07 08:00Z | 2026-10-07 18:00Z | — | 10 h |
| 2026-10-08 08:00Z | 2026-10-08 18:00Z | — | 10 h |
| 2026-10-09 08:00Z | 2026-10-09 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
- 2026-10-01 13:42Z
- status
- Cancelled notice
- self-cancels
- 2026-10-16 19:00Z
- sea
- South Atlantic Ocean
- position
- -20.398, -40.151
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-10-01 19:02Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. UNDERWATER OPERATIONS 0800Z TO 1800Z DAILY 02 THRU 16 OCT BY M/V COMANDO B AND M/V TOP WEATHER IN 20-23.85S 040-09.08W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 161900Z 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.
Collected reports in this area · survey operations
599 within 180 nm since 2000 · 60 in the last 12 months · 4 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 in progress until 120259Z oct by M/V sistac vitoria in 22-32.82S 040-04.05W2026-09-30
- Underwater operations in progress until 090259Z oct by M/V siem pilot in 22-25.32S 039-56.55W2026-09-29
- Underwater operations 0800Z to 1800Z daily 28 sep thru 12 oct by M/V calypso and M/V commando b in 20-23.18S…2026-09-27
- Underwater operations 0800Z to 1800Z daily 27 sep thru 11 oct by M/V comando b and M/V prime star in…2026-09-26
- Underwater operations 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 19-51.63S 039-56.90W2026-09-25
- 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
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
- Underwater operations 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 20-23.78S 040-09.43WSurveys · 0.3 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 · 31.8 nm
- Underwater operations 0800Z to 1800Z daily 26 sep thru 10 oct by M/V comando b in 19-51.63S 039-56.90WSurveys · 34.2 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-01 20:25Z; 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.