Submarine unreported
Western South Atlantic · Argentina · HYDROLANT 4129/17
What this record establishes
Archived notice · 2018-01-05 17:30Z
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 750/17 200200Z DEC 17.. Issued 2017-12-20 02:28Z. 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
- Western South Atlantic · Argentina. 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
- Submarine unreportedcancelled by this notice
These reports were linked by category and sea, with positions within 30 nautical miles and issue dates within 30 days of another report's recorded in-force span. Links can extend through other members, so the full group can cover a larger area or period. Proximity does not confirm that they describe one incident.
- HYDROLANT 3720/172017-11-18 · Archived notice
- HYDROLANT 3780/172017-11-23 · Archived notice
- HYDROLANT 3801/172017-11-24 · Archived notice
- HYDROLANT 3865/172017-11-30 · Archived notice
- HYDROLANT 3879/172017-12-01 · Archived notice
- HYDROLANT 4129/17 · this notice2017-12-20 · Archived notice
- issued
- 2017-12-20 02:28Z
- status
- Archived notice
- authority
- NAVAREA VI 750/17 200200Z DEC 17.
- NAVAREA
- NAVAREA VI · named as the source of this relay
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. ARGENTINA. DNC 07. 1. SUBMARINE UNREPORTED. SEARCH AND RESCUE OPERATIONS IN AREA BETWEEN 45-05S 46-30S AND 060-20W 059-20W. VESSELS IN VICINITY REQUESTED TO KEEP A SHARP LOOKOUT, ASSIST IF POSSIBLE. REPORTS TO MRCC PUERTO BELGRANO, INMARSAT-C: 470100125, PHONE: 5429 3248 7150, 5429 3248 7162. 2. NAVIGATION PROHIBITED IN AREA BETWEEN 45-10S 46-30S AND 060-35W 059-20W. 3. CANCEL HYDROLANT 3879/17.
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.
- 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.
- Keep a sharp lookout
- A request to every ship in the area to watch for the vessel, people or object described.
- Assist if possible
- The second half of the standard rescue request: ships able to help are asked to do so.
- MRCC (Maritime Rescue Coordination Centre)
- A rescue coordination centre for maritime cases only, such as MRCC Fort-de-France or MRCC Vietnam.
- Inmarsat-C / SafetyNET
- The satellite system that carries NAVAREA warnings to ships at sea, and the terminal number rescue centres give for reports.
- Navigation prohibited
- Ships may not enter or pass through the area, or a port is closed to traffic.
- 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.
Nearby notices listed in force · within 120 nm
No parsed position is available for this comparison.
Worldwide in the collected sources
0 distress & casualty cases (archived) listed in force · see all
Record snapshot 2026-10-02 13:03Z; source collection times vary.
Incidents
Search-and-rescue broadcasts, published only once a case has been closed for 30 days: groundings, sinkings, capsizes, fires, man overboard, overdue vessels. Nothing here is live. All current distress & casualty cases (archived) →
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.