Underwater operations 1000Z to 2000Z daily until 19 dec by M/V pacific guardian in area bound by 03-30.00S…
South Atlantic Ocean · HYDROLANT 3239/17
What this record establishes
Archived notice · 2017-10-11 20:31Z
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 COASTAL N 839/17 110219Z OCT 17.. Issued 2017-10-11 02:37Z. 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
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2017-10-11 02:37Z
- status
- Archived notice
- self-cancels
- 2017-12-19 21:00Z
- authority
- NAVAREA V COASTAL N 839/17 110219Z OCT 17.
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V COASTAL N
- sea
- South Atlantic Ocean
- position
- -3.593, -38.285
- vessel
- M/V PACIFIC GUARDIAN · 5 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-NORTH COAST. DNC 01. 1. UNDERWATER OPERATIONS 1000Z TO 2000Z DAILY UNTIL 19 DEC BY M/V PACIFIC GUARDIAN IN AREA BOUND BY 03-30.00S 038-14.05W, 03-30.50S 038-13.16W, 03-41.34S 038-20.33W, 03-40.86S 038-21.13W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 192100Z DEC 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.
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- 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.
- 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.
Collected reports in this area · survey operations
79 within 180 nm since 1999 · 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.
- Survey operations in progress until 182300Z may in areas bound by: a. 02-56.00S 038-00.20W, 02-56.00S…2023-05-18
- Underwater operations 0800Z to 2100Z daily 05 sep thru 05 mar 23 by M/V paracuru in 04-52.42S 036-22.45W2022-09-05
- Survey operations in progress 0800Z to 1700Z daily until 23 jul by M/V raisa II in area bound by 03-43.71S…2020-07-17
- Underwater operations 0900Z to 2100Z daily 15 aug thru 15 dec by M/V asso trentuno, M/V surffer 1871, M/V…2019-08-14
- Underwater operations 0900Z to 2100Z daily 02 aug thru 15 dec by M/V surffer 1871, M/V surffer 1930 and M/V…2019-08-01
- Underwater operations 0800Z to 2300Z daily 01 thru 15 jul by M/V sentosa, barge smitbarge 1 and M/V corenav…2019-06-30
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
56 survey operations listed in force · see all
Record snapshot 2026-10-03 16:57Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.