Surveys

Survey operations 13 jun thru 03 jul by M/V marion dufresne along trackline joining 06-39.38N 052-04.99W,…

North Atlantic Ocean · HYDROLANT 1282/23

What this record establishes

Archived notice · 2023-07-04 00:01Z

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) · MARION DUFRESNE 0/23 091302Z JUN 23.. Issued 2023-06-09 13:53Z. 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: North Atlantic Ocean. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Current notices and reporting history in the North Atlantic Ocean →

issued: 2023-06-09 13:53Z
status: Archived notice
self-cancels: 2023-07-04 00:01Z
authority: MARION DUFRESNE 0/23 091302Z JUN 23.
issued by: MARION DUFRESNE
sea: North Atlantic Ocean
position: 0.891, -43.819
vessel: M/V MARION DUFRESNE · 51 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

ATLANTIC OCEAN.
BRAZIL.
DNC 01, DNC 14.
1. SURVEY OPERATIONS 13 JUN THRU 03 JUL BY
   M/V MARION DUFRESNE ALONG TRACKLINE JOINING
   06-39.38N 052-04.99W, 06-04.20N 051-17.40W,
   05-44.55N 049-05.46W, 04-09.42N 048-59.94W,
   03-06.27N 049-23.28W, 04-27.70N 048-36.95W,
   00-39.70N 044-20.80W, 00-02.02N 044-12.67W,
   01-34.75S 043-01.42W, 01-54.50S 041-35.50W,
   02-30.00S 037-17.40W, 04-18.00S 033-12.60W.
   ONE MILE BERTH REQUESTED.
2. CANCEL THIS MSG 040001Z JUL 23.

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.
Track line joining: Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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.

All warning terms →

Collected reports in this area · survey operations

20 within 180 nm since 2001 · 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.

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

50 survey operations listed in force · see all

Record snapshot 2026-09-25 01:57Z; 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.