Surveys

Underwater operations 0800Z to 2000Z daily until 02 jun in area bound by 04-54.31S 036-25.26W, 04-54.34S…

Brazil-northeast Coast · HYDROLANT 823/16

issued: 2016-04-07 00:34Z
status: cancelled 2016-06-01 21:48Z (archive)
self-cancels: 2016-06-02 21:00Z
authority: NAVAREA V N 300/16 070018Z APR 16.
sea: South Atlantic Ocean
position: -4.824, -36.513
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

BRAZIL-NORTHEAST COAST.
DNC 01.
1. UNDERWATER OPERATIONS 0800Z TO 2000Z DAILY
   UNTIL 02 JUN IN AREA BOUND BY
   04-54.31S 036-25.26W, 04-54.34S 036-25.19W,
   04-55.41S 036-22.32W, 04-55.39S 036-22.02W,
   04-56.08S 036-21.20W, 04-56.09S 036-21.18W,
   04-55.13S 036-19.75W, 04-52.79S 036-16.61W,
   04-53.11S 036-15.93W, 04-53.10S 036-15.93W,
   04-41.83S 036-45.64W, 04-45.15S 036-44.57W,
   04-45.16S 036-44.55W.
2. CANCEL THIS MSG 022100Z JUN 16.

This area · survey operations

91 within 180 nm since 1999 · 0 in the last 12 months · 0 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Underwater operations 0800Z to 2000Z daily until 02 oct by M/V ankh with submersible in area bound by…cancelled by · 2016-06-01

Nearby now · within 120 nm

Odas buoy bravo rn-l temporarily established until 20 oct in 04-53.00S 035-46.01WNav aids · 44.8 nm
Odas buoy established in 05-09.46S 035-09.81WNav aids · 83.1 nm
Hazardous operations 03 aug thru 11 sep in area bound by 05-42.53S 034-45.02W, 06-09.83S 034-46.82W,…Exercises · 119.6 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.