Surveys

Underwater operations in progress until 31 jan 22 by M/V seven borealis and M/V siem spearfish along…

Eastern Caribbean Sea · Tobago · NAVAREA IV 1074/21

issued: 2021-11-30 15:29Z
status: cancelled 2021-12-03 15:55Z (archive)
authority: TRINIDAD AND TOBAGO 59/21 301250Z NOV 21.
position: 11.335, -61.137
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

EASTERN CARIBBEAN SEA.
TOBAGO.
1. UNDERWATER OPERATIONS IN PROGRESS
   UNTIL 31 JAN 22 BY M/V SEVEN BOREALIS AND
   M/V SIEM SPEARFISH ALONG TRACKLINE JOINING
   11-13.74N 061-31.38W, 11-15.00N 061-23.02W,
   11-16.19N 061-14.10W, 11-17.79N 061-09.07W,
   11-24.16N 060-57.79W, 11-30.51N 060-46.49W.
   500 METER BERTH REQUESTED.
2. CANCEL THIS MSG 01 FEB 22.

This area · survey operations

169 within 180 nm since 2002 · 0 in the last 12 months · 0 in force now

Trinidad and tobago2024-05-07
Trinidad and tobago2024-03-27
Trinidad and tobago2024-03-22
Trinidad and tobago2024-03-12
Underwater operations 07 thru 09 feb by M/V voyager eagle in 10-05.08N 061-02.13W2024-02-02
Trinidad and tobago2024-01-30

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

NAVAREA IV warnings in force as of 031542Z dec 21: 1087/21, 1084/21, 1083/21, 1080/21, 1079/21, 1076/21,…cancelled by · 2021-12-03

Nearby now · within 120 nm

Trinidad and tobagoNav aids · 20.5 nm
Trinidad and tobagoNav aids · 34.1 nm
Trinidad and tobagoNav aids · 50.7 nm
Trinidad and tobagoNav aids · 52.8 nm
Trinidad and tobagoOther · 57.6 nm
Faro punta mejillones light 10-42.20N 062-08.40W discontinuedNav aids · 70.2 nm
Trinidad and tobagoNav aids · 72.4 nm
Trinidad and tobagoNav aids · 75.3 nm
GrenadinesWrecks · 77.4 nm
Trinidad and tobagoNav aids · 81.9 nm
Trinidad and tobagoCable ops · 88.5 nm
Trinidad and tobagoCable ops · 89.2 nm

Worldwide now

73 survey operations in force · see all

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.