Surveys

Survey operations in progress until 01 nov by M/V ramform tethys towing 12 8000 meter long cables in area…

Western South Atlantic · Brazil · HYDROLANT 2440/23

issued: 2023-10-25 21:58Z
status: cancelled 2023-11-02 00:01Z (archive)
self-cancels: 2023-11-02 00:01Z
cancels: HYDROLANT 2414/23
authority: NAVAREA V 479/23 252131Z OCT 23.
sea: South Atlantic Ocean
position: -27.443, -46.199
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL.
DNC 01.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 01 NOV
   BY M/V RAMFORM TETHYS TOWING 12 8000 METER
   LONG CABLES IN AREA BOUND BY
   26-59.56S 046-39.27W, 26-59.41S 045-11.22W,
   27-31.40S 045-11.03W, 27-31.55S 045-59.59W,
   28-00.55S 045-59.55W, 28-00.49S 047-00.21W,
   27-21.10S 047-00.05W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 2414/23.
3. CANCEL THIS MSG 020001Z NOV 23.

This area · survey operations

216 within 180 nm since 1999 · 2 in the last 12 months · 2 in force now

Season · when survey operations happen here

month of issue, all years in the archive

Timeline

Survey operations in progress until 30 oct by M/V ramform tethys in area bound by 26-59.56S 046-39.27W,…cancels · 2023-10-23
Survey operations in progress until 30 oct by M/V ramform tethys in area bound by 26-59.56S 046-39.27W,…replaced · 2023-10-23

Nearby now · within 120 nm

Scientific bouy, yellow, fl y 20 sec established in 27-24.38S 047-15.92WSurveys · 56.9 nm
Survey operations 10 thru 17 aug by M/V ramform titan towing 12 9000 meter long cables in area bound by…Surveys · 105.8 nm
Ponta da galheta light 27-34.55S 048-24.99W unlit until 31 augNav aids · 118.3 nm

Worldwide now

86 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.