Surveys

Trinidad and tobago

Caribbean Sea · NAVAREA IV 61/24

What this record establishes

Archived notice · 2024-02-29 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) · TRINIDAD AND TOBAGO 13/24 182000Z JAN 24.. Issued 2024-01-18 21:35Z. 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
Caribbean Sea. The parsed report position is 10.613, -61.653. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the Caribbean Sea →

issued
2024-01-18 21:35Z
status
Archived notice
self-cancels
2024-02-29 00:01Z
authority
TRINIDAD AND TOBAGO 13/24 182000Z JAN 24.
NAVAREA
NAVAREA IV
issued by
TRINIDAD AND TOBAGO
sea
Caribbean Sea
position
10.613, -61.653
vessel
DREDGE COSTA LA LUZ A
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN CARIBBEAN SEA.
TRINIDAD AND TOBAGO.
 1. UNDERWATER OPERATIONS 20 JAN THRU 28 FEB
   BY DREDGE COSTA LA LUZ
   A. ALONG TRACKLINE JOINING
      10-37.71N 061-31.86W, 10-38.34N 061-30.21W,
      10-38.43N 061-30.00W, 10-38.34N 061-30.00W,
      10-38.34N 061-29.88W, 10-38.48N 061-29.88W.
   B. IN AREA BOUND BY
      10-37.50N 061-39.50W, 10-37.50N 061-39.00W,
      10-35.50N 061-39.00W, 10-37.00N 061-39.50W.
   WIDE BERTH REQUESTED.
2. CANCEL NAVAREA IV 1451/23.
3. CANCEL THIS MSG 290001Z FEB 24.

Reading this warning

Underwater operations
Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
Dredging
A dredger is deepening a channel or moving sediment, often with floating or submerged pipelines to the shore.
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.
Area bound by
Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
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 →

Collected reports in this area · survey operations

168 within 180 nm since 2003 · 8 in the last 12 months · 1 listed in force now

03
05
10
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

55 survey operations listed in force · see all

Record snapshot 2026-09-28 02:36Z; 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.