Surveys

Underwater operations in progress until 282000Z feb by M/V sao pedro glorioso in: a. 21-50.13S 040-47.78W

Western South Atlantic · Brazil · HYDROLANT 316/23

issued: 2023-02-07 21:12Z
status: cancelled 2023-02-10 14:29Z (archive)
self-cancels: 2023-02-28 21:00Z
cancels: HYDROLANT 315/23
authority: NAVAREA V COASTAL 79/23 072044Z FEB 23.
position: -21.815, -40.907
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL.
DNC 01.
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL
   282000Z FEB BY M/V SAO PEDRO GLORIOSO IN:
   A. 21-50.13S 040-47.78W.
   B. 21-50.28S 040-47.80W.
   C. 21-49.98S 040-48.96W.
   D. 21-50.13S 040-48.98W.
   E. 21-49.83S 040-50.13W.
   F. 21-49.98S 040-50.15W.
   G. 21-49.68S 040-51.29W.
   H. 21-49.83S 040-51.33W.
   I. 21-49.50S 040-51.99W.
   J. 21-49.65S 040-52.04W.
   K. 21-49.23S 040-53.04W.
   L. 21-49.37S 040-53.08W.
   M. 21-48.95S 040-54.08W.
   N. 21-49.10S 040-54.12W.
   O. 21-48.68S 040-55.12W.
   P. 21-48.83S 040-55.16W.
   Q. 21-48.41S 040-56.16W.
   R. 21-48.55S 040-56.21W.
   S. 21-48.13S 040-57.20W.
   T. 21-48.28S 040-57.25W.
   U. 21-47.85S 040-58.28W.
   V. 21-47.99S 040-58.32W.
   W. 21-47.43S 040-58.95W.
   X. 21-47.85S 040-58.88W.
   Y. 21-47.51S 040-59.29W.
   Z. 21-47.79S 040-59.43W.
   AA. 21-48.03S 040-59.36W.
   AB. 21-48.15S 040-59.20W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 315/23.
3. CANCEL THIS MSG 282100Z FEB 23.

This area · survey operations

638 within 180 nm since 2000 · 15 in the last 12 months · 15 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Underwater operations in progress until 282000Z feb by M/V sao pedro glorioso in: a. 21-50.13S 040-47.78Wcancels · 2023-02-07
Underwater operations in progress until 282000Z feb by M/V sao pedro glorioso in: a. 21-50.13S 040-47.78Wreplaced · 2023-02-07
HYDROLANT warnings in force as of 101415Z febcancelled by · 2023-02-10

Nearby now · within 120 nm

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Underwater operations in progress until 312300Z aug by M/V fugro vaquita in area bound by 21-35.43S…Surveys · 10.1 nm
RACON at cabo sao tome light 22-02.52S 041-03.17W off air until 28 sepNav aids · 15.9 nm
Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 17.8 nm
Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 30.3 nm
Underwater operations in progress until 170259Z aug in 22-22.48S 040-25.05WSurveys · 43.3 nm
Underwater operations 1000Z to 2000Z daily until 02 nov 26 by M/V fugro vaquita in: a. 22-26.32S 040-25.47WSurveys · 46.6 nm
Survey operations in progress until 09 jul 27 by M/V bgp dragon towing 250 meter long cable in area bound by…Surveys · 56.2 nm
Survey operations 10 aug 26 thru 08 mar 27 by tug mce navegacao I in area bound by 22-48.38S 041-08.21W,…Surveys · 61.8 nm
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Underwater operations 1100Z to 2100Z daily 13 thru 22 aug by M/V comando b and M/V am kirti in 20-23.90S…Surveys · 94.8 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.