Surveys

Survey operations 19 thru 21 may by M/V marion dufresne in area within ten miles of 05-38.90N 051-05.20W

North Atlantic Ocean · NAVAREA IV 549/23

What this record establishes

Archived notice · 2023-05-22 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 181401Z MAY 23.. Issued 2023-05-18 14:41Z. 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 parsed report position is 5.648, -51.087 with a 10.0 nm radius. 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 North Atlantic Ocean →

issued
2023-05-18 14:41Z
status
Archived notice
self-cancels
2023-05-22 00:01Z
authority
MARION DUFRESNE 0/23 181401Z MAY 23.
NAVAREA
NAVAREA IV
issued by
MARION DUFRESNE
sea
North Atlantic Ocean
position
5.648, -51.087 · r 10.0 nm
vessel
M/V MARION DUFRESNE · 52 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH ATLANTIC.
FRENCH GUIANA.
DNC 14.
1. SURVEY OPERATIONS 19 THRU 21 MAY BY
   M/V MARION DUFRESNE IN AREA WITHIN
   TEN MILES OF 05-38.90N 051-05.20W.
   ONE MILE BERTH REQUESTED.
2. CANCEL THIS MSG 220001Z MAY 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.
Within a radius of
A circular area — every position within a stated distance of a point.
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

26 within 180 nm since 2001 · 0 in the last 12 months · 0 listed in force now

01
05
10
15
20
23

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

J
F
M
A
M
J
J
A
S
O
N
D

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 23:12Z; 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.