Surveys

Survey operations 26 sep thru 02 oct by M/V siem dorado in area bound by 25-43.00S 042-57.00W, 25-45.00S…

Western South Atlantic · HYDROLANT 2154/23

issued: 2023-09-25 05:30Z
status: cancelled 2023-10-03 00:01Z (archive)
self-cancels: 2023-10-03 00:01Z
authority: NAVAREA V 400/23 250403Z SEP 23.
sea: South Atlantic Ocean
position: -25.740, -43.156
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
DNC 01.
1. SURVEY OPERATIONS 26 SEP THRU 02 OCT
   BY M/V SIEM DORADO IN AREA BOUND BY
   25-43.00S 042-57.00W, 25-45.00S 042-57.00W,
   25-50.00S 043-00.00W, 25-51.00S 043-04.00W,
   25-53.00S 043-04.00W, 25-56.00S 043-04.00W,
   25-58.00S 043-06.00W, 26-00.00S 043-10.00W,
   26-00.00S 043-15.00W, 25-56.00S 043-21.00W,
   25-50.00S 043-23.00W, 25-46.00S 043-22.00W,
   25-44.00S 043-22.00W, 25-42.00S 043-20.00W,
   25-41.00S 043-19.00W, 25-38.00S 043-18.00W,
   25-33.00S 043-15.00W, 25-28.00S 043-09.00W,
   25-35.00S 042-55.00W, 25-40.00S 042-55.00W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 030001Z OCT 23.

This area · survey operations

495 within 180 nm since 2000 · 0 in the last 12 months · 0 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Nearby now · within 120 nm

Hazardous operations in progress until 060400Z jun 27 in area bound by 24-39.87S 042-29.30W, 24-39.78S…Exercises · 74.4 nm
Hazardous operations 0800Z to 2100Z daily 18 thru 20 aug in area within ten miles of 25-06.00S 041-13.00WExercises · 112 nm

Worldwide now

86 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.