Underwater operations are ongoing off Brazil at 22-25.32S 039-56.55W until 9 October, with a wide berth requested.
South Atlantic Ocean · HYDROLANT 1929/26
What this record establishes
Cancelled notice · 2026-09-29 13:30Z
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 2026-09-29 08:44Z. First collected 2026-09-29 16:32Z; last seen in collection 2026-10-01 02:17Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- South Atlantic Ocean. The parsed report position is -22.422, -39.943. 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 →
- issued
- 2026-09-29 08:44Z
- status
- Cancelled notice
- self-cancels
- 2026-10-09 03:59Z
- sea
- South Atlantic Ocean
- position
- -22.422, -39.943
- vessel
- M/V SIEM PILOT · 4 messages
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-29 16:32Z
Original warning text
SOUTH ATLANTIC. BRAZIL. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 090259Z OCT BY M/V SIEM PILOT IN 22-25.32S 039-56.55W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 090359Z 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.
- 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.
- 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.
Collected reports in this area · survey operations
782 within 180 nm since 2000 · 59 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 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
- 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
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 2026-10-01 02:21Z; 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.