Hazardous operation 291900Z apr to 011900Z may in area within ten miles of 23-38.00S 042-27.00W
South Atlantic Ocean · HYDROLANT 873/24
What this record establishes
Archived notice · 2024-05-01 20:00Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA V 131/24 241233Z APR 24.. Issued 2024-04-24 13:07Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- South Atlantic Ocean. The parsed report position is -23.633, -42.450 with a 10.0 nm radius. 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 · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2024-04-29 19:00Z | 2024-05-01 19:00Z | — | 48 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2024-04-24 13:07Z
- status
- Archived notice
- self-cancels
- 2024-05-01 20:00Z
- authority
- NAVAREA V 131/24 241233Z APR 24.
- NAVAREA
- NAVAREA V · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -23.633, -42.450 · r 10.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL. DNC 01. 1. HAZARDOUS OPERATION 291900Z APR TO 011900Z MAY IN AREA WITHIN TEN MILES OF 23-38.00S 042-27.00W. 2. CANCEL THIS MSG 012000Z MAY 24.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- 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.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · other warnings
45 within 180 nm since 2000 · 0 in the last 12 months · 0 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.
- M/V rademaker on fire in 23-24.75S 043-51.85W2023-10-17
- Cabo frio light 23-00.81S 042-00.05W at reduced intensity until 25 oct2023-04-29
- Six persons overboard from vessel in 22-47.27S 043-07.78W on 05 feb2023-02-06
- Port of acu vts (21-50.00S 040-58.00W) radar inoperative until 030005 mar 232022-09-04
- Port of acu vts (21-50.00S 040-58.00W) radar inoperative until 120000Z jan 232022-07-16
- Macae light 22-24.9S 041-42.4W at reduced intensity until 10 oct 222022-04-13
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
23 other warnings listed in force · see all
Record snapshot 2026-10-02 01:25Z; source collection times vary.
Other
Everything the classifier did not place elsewhere. All current other warnings →
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.