Surveys

Survey operations in progress until 300400Z mar by M/V nhi sirius in area between 24-05.8S 24-03.4S and…

Western South Atlantic · Brazil-south Coast · HYDROLANT 987/17

issued: 2017-03-27 17:16Z
status: cancelled 2017-03-30 05:00Z (archive)
self-cancels: 2017-03-30 05:00Z
authority: NAVAREA V COASTAL 268/17 271650Z MAR 17.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-SOUTH COAST.
DNC 01.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 300400Z MAR
   BY M/V NHI SIRIUS IN AREA BETWEEN
   24-05.8S 24-03.4S AND 045-40.0W 045-38.1W.
2. CANCEL THIS MSG 300500Z MAR 17.

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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.