Surveys

Underwater operations 1100Z to 2100Z daily 14 thru 19 aug by M/V proboat, M/V sion and M/V alcor mar in…

Brazil-southeast Coast · HYDROLANT 2055/16

issued: 2016-08-13 09:25Z
status: cancelled 2016-08-19 22:00Z (archive)
self-cancels: 2016-08-19 22:00Z
cancels: HYDROLANT 2044/16
authority: NAVAREA V E 654/16 130123Z AUG 16 - NAVAREA V E 656/16 130148Z AUG 16.
sea: South Atlantic Ocean
position: -20.290, -40.190
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

BRAZIL-SOUTHEAST COAST.
DNC 01.
1. UNDERWATER OPERATIONS 1100Z TO 2100Z DAILY
   14 THRU 19 AUG BY M/V PROBOAT, M/V SION AND
   M/V ALCOR MAR IN 20-17.38S 040-11.38W.
2. CANCEL HYDROLANT 2044/16.
3. CANCEL THIS MSG 192200Z AUG 16.

Activity windows · 6 in this warning

opens (UTC)	closes (UTC)	local	length
2016-08-14 11:00Z	2016-08-14 21:00Z	—	10 h
2016-08-15 11:00Z	2016-08-15 21:00Z	—	10 h
2016-08-16 11:00Z	2016-08-16 21:00Z	—	10 h
2016-08-17 11:00Z	2016-08-17 21:00Z	—	10 h
2016-08-18 11:00Z	2016-08-18 21:00Z	—	10 h
2016-08-19 11:00Z	2016-08-19 21:00Z	—	10 h

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

554 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

Derelict lifeboat adrift vicinity 21-58.37S 040-09.72W at 111850Z augcancels · 2016-08-12
Derelict lifeboat adrift vicinity 21-58.37S 040-09.72W at 111850Z augreplaced · 2016-08-12

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 · 5.3 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 · 5.5 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 · 6 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 · 6.1 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 · 6.5 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 · 6.6 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 · 6.7 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 · 26.6 nm
Barra de itabapoana light 21-18.80S 040-57.90W unlit until 08 sep 26Nav aids · 75.3 nm
Odas buoy temporarily established until 13 apr 27 in 21-34.20S 040-43.62WNav aids · 82.6 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 · 99.3 nm
Underwater operations 281000Z jul to 192100Z aug by M/V umi polaris in area bound by 21-53.65S 040-49.70W,…Surveys · 102.5 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.