Exercises
Hazardous operations
Brazil-south Coast · HYDROLANT 778/12
What this record establishes
Archived notice · 2012-04-17 22:00Z
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 S 460/12 080058Z APR 12 - WZ 489/12 072116Z APR 12 - WZ 490/12 080249Z APR 12 - JRCC STAVANGER 080217Z APR 12.. Issued 2012-04-08 08:20Z. 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
- Brazil-south Coast. No usable coordinates were parsed; a location-based nearby search is unavailable. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Underwater operations in progress until further notice by cableship leon thevenin with submersible vicinity…cancelled by this notice
- Mrcc aberdeen mf r/t service at greg ness 57-08N 002-03W off aircancelled by this notice
- M/V nordic apollo reports master requiring medical assistance in 05-24N 010-29W at 072024Z aprcancelled by this notice
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2012-04-13 15:00Z | 2012-04-17 21:00Z | — | 102 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2012-04-08 08:20Z
- status
- Archived notice
- self-cancels
- 2012-04-17 22:00Z
- authority
- NAVAREA V S 460/12 080058Z APR 12 - WZ 489/12 072116Z APR 12 - WZ 490/12 080249Z APR 12 - JRCC STAVANGER 080217Z APR 12.
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V S
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BRAZIL-SOUTH COAST. HAZARDOUS OPERATIONS. 1. HAZARDOUS OPERATIONS 131500Z TO 172100Z APR IN AREA BETWEEN 23-12S 23-42S AND 043-25W 044-05W. 2. CANCEL HYDROLANT 763/12(37), OPERATIONS COMPLETED. 3. CANCEL HYDROLANT 772/12(35), SERVICE RESTORED. 4. CANCEL HYDROLANT 776/12(51), ASSISTANCE RECEIVED. 5. CANCEL THIS MSG 172200Z APR.
Reading this warning
- Hazardous operations
- NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Nearby notices listed in force · within 120 nm
No parsed position is available for this comparison.
Worldwide in the collected sources
28 military exercises listed in force · see all
Record snapshot 2026-10-02 07:44Z; source collection times vary.
Exercises
Gunnery, firing and naval exercise areas. All current military exercises →
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.