Surveys

Survey operations are underway until 31 December near Guyana by vessel AHT DN87 and tug TELESTO; wide berth requested.

North Atlantic Ocean · NAVAREA IV 705/26

What this record establishes

Listed in force

The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.

Source and dates
NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-07-20 20:16Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-09-29 16:47Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
North 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 North Atlantic Ocean →

issued
2026-07-20 20:16Z
status
Listed in force
self-cancels
2027-01-01 00:01Z
NAVAREA
NAVAREA IV
sea
North Atlantic Ocean
position
6.935, -58.069
vessel
TUG TELESTO
nearest port
Georgetown · 9 nm
source
NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-08-17 13:41Z

Original warning text

NORTH ATLANTIC.
GUYANA.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 31 DEC
   BY VESSEL AHT DN87 AND TUG TELESTO
   IN AREA BOUND BY
   07-03.06N 057-57.60W, 07-02.68N 057-57.22W,
   06-49.95N 058-09.90W, 06-49.04N 058-10.21W,
   06-49.15N 058-10.75W, 06-50.13N 058-10.41W,
   06-50.34N 058-10.28W.
   WIDE BERTH REQUESTED.
2. CANCEL NAVAREA IV 99/26.
3. CANCEL THIS MSG 010001Z JAN 27.

Reading this warning

Survey operations
A research or survey vessel is mapping the seabed or water column, often while towing equipment.
Tow / towing
A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
NAVAREA
One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
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 →

Conditions at the position · now

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MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation

Collected reports in this area · survey operations

271 within 180 nm since 2014 · 16 in the last 12 months · 13 listed in force now

14
15
20
25
26

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

Worldwide in the collected sources

54 survey operations listed in force · see all

Record snapshot 2026-09-29 16:49Z; 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.