Survey operations 270500Z feb to 252100Z mar by M/V sable in area bound by 10-44.76S 036-33.13W, 10-44.53S…
South Atlantic Ocean · HYDROLANT 717/20
What this record establishes
Archived notice · 2020-03-25 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 COASTAL E 148/20 270023Z FEB 20.. Issued 2020-02-27 01:04Z. 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.
Current notices and reporting history in the South Atlantic Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2020-02-27 05:00Z | 2020-03-25 21:00Z | — | 664 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2020-02-27 01:04Z
- status
- Archived notice
- self-cancels
- 2020-03-25 22:00Z
- authority
- NAVAREA V COASTAL E 148/20 270023Z FEB 20.
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V COASTAL E
- sea
- South Atlantic Ocean
- position
- -10.971, -36.322
- vessel
- M/V SABLE · 6 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-EAST COAST. DNC 01. 1. SURVEY OPERATIONS 270500Z FEB TO 252100Z MAR BY M/V SABLE IN AREA BOUND BY 10-44.76S 036-33.13W, 10-44.53S 036-05.71W, 11-11.77S 036-05.51W, 11-12.01S 036-32.90W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 252200Z MAR 20.
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.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- 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.
- 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.
Collected reports in this area · survey operations
37 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.
- Underwater operations 0500Z to 1600Z daily until 21 oct by M/V xin hong, vessel luma d, and vessel vitor I…2020-10-16
- Underwater operations 160700Z to 161500Z sep by tug mar de espanha, M/V macau, M/V grauna and M/V nb…2019-09-15
- Survey operations 09 may thru 30 sep by M/V ramform tethys towing 16 8100 meter long cables in area bound by…2018-05-08
- Underwater operations in progress until 150359Z feb 15 in area bound by 11-15.51S 036-59.70W, 11-14.58S…2014-08-21
- Hydrographic survey 09 thru 12 may by M/V sirius in area bound by 10-42S 036-27W, 10-31S 036-07W, 10-51S…2011-05-06
- Survey operations 131100Z to 151000Z oct by M/V albardao and M/V aracatuba in area bound by 08-09.1S…2010-10-11
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
- Maceio light 09-41.03S 035-43.38W unlit until 31 octNav aids · 85 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-03 03:08Z; 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.