Surveys

Survey operations in progress until 20 aug by M/V oceanic sirius towing 12 11112 meter cables in area bound…

Western South Atlantic · Brazil-southeast Coast · HYDROLANT 2103/21

issued: 2021-08-14 00:38Z
status: cancelled 2021-08-20 21:48Z (archive)
authority: NAVAREA V 369/21 140035Z AUG 21.
sea: South Atlantic Ocean
position: -24.918, -39.950
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-SOUTHEAST COAST.
DNC 01.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 20 AUG BY
   M/V OCEANIC SIRIUS TOWING 12 11112 METER
   CABLES IN AREA BOUND BY
   26-47.10S 042-43.70W, 24-18.35S 042-40.05W,
   24-18.80S 042-06.62W, 24-06.12S 042-06.45W,
   23-31.55S 040-58.48W, 22-50.33S 039-56.13W,
   22-35.07S 037-41.03W, 26-34.27S 037-35.21W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 21 AUG 21.

This area · survey operations

623 within 180 nm since 2000 · 7 in the last 12 months · 5 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Survey operations in progress until 27 aug by M/V oceanic sirius towing 12 11112 meter long cables in area…cancelled by · 2021-08-20

Nearby now · within 120 nm

Hazardous operations 0800Z to 2100Z daily 18 thru 20 aug in area within ten miles of 25-06.00S 041-13.00WExercises · 69.8 nm

Worldwide now

84 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.