Ship-name archive · official navigational warnings

TOP Weather

1 public warning uses this name, 2026-09-17. The notices cover South Atlantic Ocean. Compare what each source reports, how its wording changes, and which identifiers are actually attached to the name.

These are mentions of a name. They can describe vessel operations, hazards or different ships using the same name.

What the reports establish

No displayed warning is recorded as in force. 1 has been cancelled. Cancellation concerns the notice; it does not establish the vessel’s current condition or a successful recovery.

First dated report in this archive

Issued 2026-09-17 01:30Z

Underwater operations 0800Z to 1700Z daily 17 sep thru 01 oct by M/V top weather and M/V comando b in…

Surveys · South Atlantic · Brazil

HYDROLANT 1843/26

Which vessel does this name identify?

No IMO or MMSI can be confidently attached to this name from the displayed warnings. A matching name alone cannot establish that these reports concern the same vessel.

Name styles in these reports: M/V. Interpreted vessel types: merchant vessel.

Warning record and geographic coverage

Dated report span: 0 days
Warning days covered: 0.5 days
Separate warning periods: 1
Warnings with a map location: 1 / 1

Warning days combine recorded issue-to-cancellation periods, counting overlapping days once. In-force notices extend to the calculation time. These periods describe the warning record, not days at sea or the duration of a vessel incident.

South Atlantic Ocean warning history

Map center of HYDROLANT 1843/26, issued 2026-09-17 01:30Z: -20.398, -40.151. The center may represent an operation area, route or hazard. It is not a confirmed vessel position. Issue time is the warning publication time; any observation time must be read in the original message.

Reading these reports

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.

All warning terms →

Source warnings · 1

Oldest dated warning first; undated messages follow. Open each entry to read its complete original text.

One public mention is available. HYDROLANT 1843/26 contains the full warning record.

1
SurveysHYDROLANT 1843/26Issued 2026-09-17 01:30Z
Underwater operations 0800Z to 1700Z daily 17 sep thru 01 oct by M/V top weather and M/V comando b in…
South Atlantic · Brazil · South Atlantic Ocean
Warning cancelled 2026-09-17 14:30Z (dropped from inforce)
Read original warning
```
SOUTH ATLANTIC.
BRAZIL.
1. UNDERWATER OPERATIONS 0800Z TO 1700Z
   DAILY 17 SEP THRU 01 OCT BY M/V TOP WEATHER
   AND M/V COMANDO B IN 20-23.85S 040-09.08W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 011800Z OCT 26.
```

Not for navigation. Names and identifiers are extracted automatically from the cited warnings. This archive does not verify current vessel position, seaworthiness or incident resolution. Mariners must use official NAVAREA broadcasts and their national MSI service.