Surveys

Survey operations in progress until 12 jul 11 in: a. 23-36.25S 041-34.37W

South Atlantic Ocean · HYDROLANT 2178/10

What this record establishes

Archived notice · 2010-12-31 09:34Z

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 1472/10 170013Z NOV 10.. Issued 2010-11-17 05:20Z. 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: South Atlantic Ocean. The parsed report position is -23.605, -41.573. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the South Atlantic Ocean →

issued: 2010-11-17 05:20Z
status: Archived notice
authority: NAVAREA V S 1472/10 170013Z NOV 10.
NAVAREA: NAVAREA V · named as the source of this relay
issued by: NAVAREA V S
sea: South Atlantic Ocean
position: -23.605, -41.573
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BRAZIL-SOUTHEAST COAST.
1. SURVEY OPERATIONS IN PROGRESS UNTIL
   12 JUL 11 IN:
   A. 23-36.25S 041-34.37W.
   B. 23-36.32S 041-34.35W.
   ONE MILE BERTH REQUESTED.
2. CANCEL THIS MSG 13 JUL 11.

Reading this warning

Survey operations: A research or survey vessel is mapping the seabed or water column, often while towing equipment.
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.

All warning terms →

Collected reports in this area · survey operations

781 within 180 nm since 2000 · 22 in the last 12 months · 3 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.

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

Hazardous operations in progress until 060400Z jun 27 in area bound by 24-39.87S 042-29.30W, 24-39.78S…Exercises · 80.9 nm
Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 94.4 nm
Underwater operations in progress until 110300Z oct by M/V sistac vitoria in 22-32.81S 040-04.04WSurveys · 104.6 nm
Underwater operations in progress until 140001Z nov by M/V fugro vaquita in area bound by 22-03.00S…Surveys · 106.5 nm

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-03 05:29Z; 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.