Surveys

Underwater operations 1100Z to 2000Z daily 15 jun thru 04 jul by M/V saga tide and M/V proboat in 20-22.60S…

Western South Atlantic · Brazil-southeast Coast · HYDROLANT 1798/19

issued: 2019-06-15 08:37Z
status: cancelled 2019-07-04 21:00Z (archive)
self-cancels: 2019-07-04 21:00Z
cancels: HYDROLANT 1449/19
authority: NAVAREA V COASTAL E 556/19 150307Z JUN 19.
sea: South Atlantic Ocean
position: -20.377, -40.214
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-SOUTHEAST COAST.
DNC 01.
1. UNDERWATER OPERATIONS 1100Z TO 2000Z DAILY
   15 JUN THRU 04 JUL BY M/V SAGA TIDE AND
   M/V PROBOAT IN 20-22.60S 040-12.82W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 1449/19.
3. CANCEL THIS MSG 042100Z JUL 19.

Activity windows · 20 in this warning

opens (UTC)	closes (UTC)	local	length
2019-06-15 11:00Z	2019-06-15 20:00Z	—	9 h
2019-06-16 11:00Z	2019-06-16 20:00Z	—	9 h
2019-06-17 11:00Z	2019-06-17 20:00Z	—	9 h
2019-06-18 11:00Z	2019-06-18 20:00Z	—	9 h
2019-06-19 11:00Z	2019-06-19 20:00Z	—	9 h
2019-06-20 11:00Z	2019-06-20 20:00Z	—	9 h
2019-06-21 11:00Z	2019-06-21 20:00Z	—	9 h
2019-06-22 11:00Z	2019-06-22 20:00Z	—	9 h
… 12 more

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

This area · survey operations

561 within 180 nm since 2000 · 24 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 1100Z to 2000Z daily 13 may thru 20 jun by M/V federal and M/V proboat in 20-18.27S…cancels · 2019-05-12
Underwater operations 1100Z to 2000Z daily 13 may thru 20 jun by M/V federal and M/V proboat in 20-18.27S…replaced · 2019-05-12

Nearby now · within 120 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 · 2.1 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 · 3.2 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 · 3.3 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 · 3.6 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 · 3.8 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 · 4.2 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 · 4.6 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 · 31.9 nm
Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 70.3 nm
Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 77.2 nm
Survey operations in progress until 312200Z aug in area bound by 21-36.17S 041-00.00W, 21-36.05S 040-37.59W,…Surveys · 93.9 nm
Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 97.1 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.