Surveys

Survey operations 09 thru 16 mar by M/V hai yang shi you 720 towing ten 11112 meter long cables in area…

Western South Atlantic · Brazil-east Coast · HYDROLANT 677/21

issued: 2021-03-08 21:03Z
status: cancelled 2021-03-16 00:26Z (archive)
authority: NAVAREA V 106/21 082028Z MAR 21.
position: -20.478, -39.079
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-EAST COAST.
DNC 01.
1. SURVEY OPERATIONS 09 THRU 16 MAR BY
   M/V HAI YANG SHI YOU 720 TOWING TEN
   11112 METER LONG CABLES IN AREA BOUND BY
   20-37S 039-04W, 20-36S 039-08W,
   20-13S 038-59W, 20-36S 039-07W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 17 MAR 21.

This area · survey operations

558 within 180 nm since 2000 · 14 in the last 12 months · 14 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Survey operations in progress until 23 mar by M/V hai yang shi you 720 towing ten 11112 meter long cables in…cancelled by · 2021-03-16

Nearby now · within 120 nm

Underwater operations 0800Z to 1800Z daily 02 thru 16 aug by M/V comando b and M/V royal topaz in 20-21.62S…Surveys · 59.7 nm
Underwater operations in progress until 27 aug by M/V navios felix and M/V comando b in 20-22.12S 040-08.38WSurveys · 60 nm
Underwater operations 0800Z to 1800Z daily 08 thru 22 aug by M/V marsanne and M/V comando b in 20-23.57S…Surveys · 60.4 nm
Underwater operations 0800Z to 1800Z daily 11 thru 25 aug by M/V comando b and M/V faneromeni in 20-23.00S…Surveys · 60.5 nm
Underwater operations 1100Z to 2100Z daily 12 thru 21 aug by M/V comando b and M/V faneromeni in 20-23.67S…Surveys · 60.9 nm
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 · 61.1 nm
Foul ground until 06 dec 27 in area bound by 19-53.87S 039-59.68W, 19-54.15S 039-59.27W, 19-53.08S…Wrecks · 62 nm
Underwater operations 1100Z to 2100Z daily 15 thru 29 aug by M/V comando b and M/V rosco banyan in 20-23.37S…Surveys · 62.1 nm
Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 113.3 nm
Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 117.1 nm

Worldwide now

75 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.