Surveys

Survey operations in progress until 26 sep by M/V oceanic sirius towing 12 12000 meter long cables in area…

Western South Atlantic · HYDROLANT 2847/20

issued: 2020-09-18 01:03Z
status: cancelled 2020-09-27 00:01Z (archive)
cancels: HYDROLANT 2786/20
authority: NAVAREA V 307/20 180037Z SEP 20.
sea: South Atlantic Ocean
position: -25.393, -40.957
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
DNC 01.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 26 SEP BY
   M/V OCEANIC SIRIUS TOWING 12 12000 METER LONG
   CABLES IN AREA BOUND BY
   25-02.75S 042-01.20W, 25-43.82S 042-01.57W,
   25-44.50S 039-53.78W, 25-03.15S 039-53.38W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 2786/20.
3. CANCEL THIS MSG 27 SEP 20.

This area · survey operations

541 within 180 nm since 2000 · 5 in the last 12 months · 3 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Survey operations 12 thru 20 sep by M/V oceanic sirius towing 12 12000 meter cables in area bound by…cancels · 2020-09-12
Survey operations 12 thru 20 sep by M/V oceanic sirius towing 12 12000 meter cables in area bound by…replaced · 2020-09-12

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 · 22.5 nm
Hazardous operations in progress until 060400Z jun 27 in area bound by 24-39.87S 042-29.30W, 24-39.78S…Exercises · 95.4 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.