Missile operations 1200Z to 2359Z daily 23 thru 28 apr in area bound by 51-44.0S 058-01.6W, 51-44.4S…
South Atlantic Ocean · HYDROLANT 1231/18
What this record establishes
Archived notice · 2018-04-19 15:43Z
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 VI 190/18 181416Z APR 18.. Issued 2018-04-18 14:51Z. 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 map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROLANT 1231/18 and this msglater cancellation notice
Current notices and reporting history in the South Atlantic Ocean →
Activity windows · 6 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-04-23 12:00Z | 2018-04-23 23:59Z | — | 11 h 59 |
| 2018-04-24 12:00Z | 2018-04-24 23:59Z | — | 11 h 59 |
| 2018-04-25 12:00Z | 2018-04-25 23:59Z | — | 11 h 59 |
| 2018-04-26 12:00Z | 2018-04-26 23:59Z | — | 11 h 59 |
| 2018-04-27 12:00Z | 2018-04-27 23:59Z | — | 11 h 59 |
| 2018-04-28 12:00Z | 2018-04-28 23:59Z | — | 11 h 59 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-04-18 14:51Z
- status
- Archived notice
- self-cancels
- 2018-04-29 00:59Z
- authority
- NAVAREA VI 190/18 181416Z APR 18.
- NAVAREA
- NAVAREA VI · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -51.838, -57.884
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. FALKLAND ISLANDS. DNC 07. 1. MISSILE OPERATIONS 1200Z TO 2359Z DAILY 23 THRU 28 APR IN AREA BOUND BY 51-44.0S 058-01.6W, 51-44.4S 057-53.4W, 51-48.1S 057-40.1W, 51-55.2S 057-47.1W, 51-57.2S 058-00.8W, 51-49.4S 058-01.6W, 51-44.0S 058-01.6W. 2. CANCEL THIS MSG 290059Z APR 18.
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.
- Missile firing
- Missile tests or exercises, with the danger area and times during which missiles may be in flight or falling.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- 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.
- 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 · missile & rocket hazards
11 within 180 nm since 2010 · 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.
- Missile operations 150001Z to 292359Z oct in area bound by 51-44.0S 058-01.6W, 51-44.4S 057-53.4W, 51-48.1S…2018-10-12
- Missile operations 301000Z oct to 032300Z nov in area bound by 51-44.0S 058-01.6W, 51-44.4S 057-53.4W,…2017-10-25
- Hazardous operations 1100Z to 2300Z daily 19 thru 28 oct in area bound by 51-44.03S 058-02.33W, 51-44.07S…2016-10-14
- Hazardous operations 1100Z to 2200Z daily 14 thru 27 apr in area bound by 51-44.03S 058-02.33W, 51-44.07S…2014-04-10
- Hazardous operations 1100Z to 2200Z daily 15 thru 26 apr in area bound by 51-44.03S 058-02.33W, 51-44.07S…2013-04-11
- Hazardous operations 1200Z to 2200Z daily 08 thru 19 oct in area bound by 51-44.0S 058-02.6W, 51-44.1S…2012-10-03
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
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
4 missile & rocket hazards listed in force · see all
Record snapshot 2026-09-24 17:16Z; source collection times vary.
Missiles
Missile firings, rocket launches and space debris re-entry areas. All current missile & rocket hazards →
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.