Survey operations in the South Atlantic Ocean

Hydrographic and scientific survey vessels, often towing long arrays.

in force
18
last 12 months
30
vs previous 12 (4)
+650%
since 1998
2,293

Coverage note: the NGA archive ends 2024-05 and live collection began 2026-08-17. Warnings issued in between are here only if they were still in force when collection started, so 2024–2026 are under-counted.

In force now · 18

  1. HYDROLANT 1573/26in force2026-08-14
    Underwater operations by vessels Comando B and Rosco Banyan in South Atlantic, Brazil at 20-23S 040-10W daily 15-29 August, wide berth requested.
    South Atlantic · Brazil
  2. HYDROLANT 1566/26in force2026-08-13
    Underwater operations by vessels Comando B and Faneromeni in South Atlantic off Brazil at 20-23.67S 040-09.45W, 12-21 August daily 1100Z-2100Z, wide berth requested.
    South Atlantic · Brazil
  3. HYDROLANT 1565/26in force2026-08-13
    Underwater operations by vessels Comando B and AM Kirti occur daily from 13 to 22 August at 20-23.90S 040-09.67W; wide berth requested.
    South Atlantic · Brazil
  4. HYDROLANT 1560/26in force2026-08-13
    Underwater operations are in progress off Brazil until 27 August by vessels Navios Felix and Comando B at 20-22.12S 040-08.38W; wide berth requested.
    South Atlantic · Brazil
  5. HYDROLANT 1544/26in force2026-08-10
    Underwater operations by vessels Comando B and Faneromeni occur daily 0800Z to 1800Z from 11 to 25 August at 20-23S 040-09W, wide berth requested.
    South Atlantic · Brazil
  6. HYDROLANT 1541/26in force2026-08-09
    Survey operations by tug MCE Navegacao I in South Atlantic off Brazil from 10 August 2026 to 8 March 2027. Wide berth requested.
    South Atlantic · Brazil
  7. HYDROLANT 1540/26in force2026-08-09
    The vessel Ramform Titan is conducting survey operations towing twelve 9000-meter-long cables off Brazil from 10 to 17 August.
    South Atlantic · Brazil
  8. HYDROLANT 1529/26in force2026-08-08
    Survey operations are in progress until 09 July 2027 by vessel BGP Dragon towing a 250-meter cable near Brazil; wide berth requested.
    South Atlantic · Brazil
  9. HYDROLANT 1523/26in force2026-08-07
    Underwater operations by motor vessels Marsanne and Comando B in South Atlantic off Brazil at 20-23.57S 040-08.87W, daily Aug 8-22, wide berth requested, canceled Aug 26.
    South Atlantic · Brazil
  10. HYDROLANT 1512/26in force2026-08-06
    Underwater operations are underway in South Atlantic off Brazil at 22-22.48S 040-25.05W until 170259Z August, wide berth requested; message cancels 170359Z August.
    South Atlantic · Brazil
  11. HYDROLANT 1484/26in force2026-08-01
    Underwater operations by M/V Comando B and M/V Royal Topaz at 20-21.62S 040-08.00W off Brazil, August 2-16, wide berth requested.
    South Atlantic · Brazil
  12. HYDROLANT 1445/26in force2026-07-27
    Underwater operations by vessel UMI Polaris in the South Atlantic off Brazil from 28 July to 19 August, wide berth requested.
    South Atlantic · Brazil
  13. HYDROLANT 1294/26in force2026-07-03
    Survey operations are underway by vessel Ramform Victory towing 12 cables three miles long in the South Atlantic off Angola; a five-mile berth is requested.
    South Atlantic · Angola
  14. HYDROLANT 1160/26in force2026-06-17
    Underwater operations by vessel Fugro Vaquita are in progress until 140001Z November, with wide berth requested; cancels HYDROLANT 1157/26.
  15. HYDROLANT 1021/26in force2026-05-27
    Survey operations continue until August 31, 2200 UTC in the South Atlantic off Brazil; wide berth requested.
    South Atlantic · Brazil
  16. HYDROLANT 985/26in force2026-05-21
    Underwater operations by vessel Fugro Vaquita continue until August 31st in the South Atlantic off Brazil, wide berth requested.
    South Atlantic · Brazil
  17. HYDROLANT 397/26in force2026-02-27
    A yellow scientific buoy flashing every 20 seconds is established at 27-24.38S 047-15.92W off Brazil until 25 August.
    South Atlantic · Brazil
  18. HYDROLANT 2010/25in force2025-11-28
    Underwater survey operations by vessel Fugro Vaquita off Brazil daily from 10:00 to 20:00 UTC until November 2, 2026; wide berth requested.
    South Atlantic · Brazil

Longest in force

  1. HYDROLANT 2010/25in force2025-11-28 · 268 d
    Underwater survey operations by vessel Fugro Vaquita off Brazil daily from 10:00 to 20:00 UTC until November 2, 2026; wide berth requested.
    South Atlantic · Brazil
  2. HYDROLANT 397/26in force2026-02-27 · 177 d
    A yellow scientific buoy flashing every 20 seconds is established at 27-24.38S 047-15.92W off Brazil until 25 August.
    South Atlantic · Brazil
  3. HYDROLANT 985/26in force2026-05-21 · 93 d
    Underwater operations by vessel Fugro Vaquita continue until August 31st in the South Atlantic off Brazil, wide berth requested.
    South Atlantic · Brazil
  4. HYDROLANT 1021/26in force2026-05-27 · 87 d
    Survey operations continue until August 31, 2200 UTC in the South Atlantic off Brazil; wide berth requested.
    South Atlantic · Brazil
  5. HYDROLANT 1160/26in force2026-06-17 · 67 d
    Underwater operations by vessel Fugro Vaquita are in progress until 140001Z November, with wide berth requested; cancels HYDROLANT 1157/26.

By year

98
99
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

By month (all years)

J
F
M
A
M
J
J
A
S
O
N
D

Other hazards in the South Atlantic Ocean

Archive · 2,275 cancelled

  1. HYDROLANT 1411/032003-07-22 → 2003-07-26
    Oceanographic operations 25 jul by M/V antares in 22-30S 039-00W
  2. HYDROLANT 1146/032003-06-11 → 2003-07-12
    Underwater operations in progress until further notice by M/V mannheim V towing 8000 meter long cable in…
  3. HYDROLANT 1089/032003-06-04 → 2003-06-07
    Oceanographic operations 05 thru 06 jun by M/V antares vicinity 23-54.5S 044-00.0W
  4. HYDROLANT 1041/032003-05-28 → 2003-05-29
    Survey operations in progress until 020300Z jun by M/V sonne along trackline between 05-23.8S 035-19.8W and…
  5. HYDROLANT 910/032003-05-07 → 2003-05-23
    Survey operations in progress until 230200Z may by M/V sonne in area bound by 05-00S 034-57W, 05-00S…
  6. HYDROLANT 585/032003-03-19 → 2003-03-27
    Hydrographic survey in progress until 271200Z mar by M/V rou 22 oyarvide in area bound by 34-42.0S…
  7. HYDROLANT 569/032003-03-15 → 2003-03-24
    Oceanographic operations in progress until 23 mar by M/V antares in area bound by 27-41S 048-19W, 29-21S…
  8. HYDROLANT 538/032003-03-11 → 2003-03-19
    Hydrographic survey 111100Z to 220259Z mar by M/V rou 22 oyarvide in area bound by 34-42.0S 053-45.0W,…
  9. HYDROLANT 482/032003-03-03 → 2003-03-14
    Oceanographic operations 06 thru 13 mar by M/V antares in area bound by 29-30S 049-39W, 31-09S 046-30W,…
  10. HYDROLANT 379/032003-02-18 → 2003-03-01
    Oceanographic operations 19 thru 28 feb by M/V antares in area bound by 32-11S 051-31W, 33-45S 048-29W,…
  11. HYDROLANT 278/032003-02-06 → 2003-02-16
    Oceanographic operations 07 thru 15 feb by M/V antares in area bound by 33-51S 053-00W, 35-21S 049-48W,…
  12. HYDROLANT 190/032003-01-27 → 2003-02-07
    Underwater operations 29 jan thru 06 feb by M/V le suroit in area bound by 05-48.0S 009-42.0E, 05-43.1S…
  13. HYDROLANT 2750/022002-12-14 → 2003-01-04
    Oceanographic operations 17 dec to 03 jan by M/V le suroit in area bound by 00-00 023-00W, 10-00S 010-00W,…
  14. HYDROLANT 2561/022002-11-20 → 2002-11-29
    Oceanographic operations in progress until 28 nov by M/V antares in area bound by 23-16S 044-07W, 23-54S…
  15. HYDROLANT 2548/022002-11-19 → 2002-11-22
    Oceanographic operations in progress until 21 nov by M/V almirante camara in area bound by 03-25S 037-58W,…
  16. HYDROLANT 2458/022002-11-07 → 2002-11-11
    Underwater operations in pgogress until 150300Z nov by M/V rou 22 oyarvide in area bound by 34-42.0S…
  17. HYDROLANT 2442/022002-11-04 → 2002-11-08
    Oceanographic operations in progress until 16 nov by M/V antares in area bound by 22-20S 041-00W, 25-15S…
  18. HYDROLANT 2433/022002-11-02 → 2002-11-04
    Oceanographic operations 04 thru 16 nov by M/V antares in area bound by 22-20S 041-00W, 25-15S 034-33W,…
  19. HYDROLANT 2370/022002-10-26 → 2002-11-05
    Oceanographic operations in progress until 04 nov by M/V almirante camara in area bound by 03-25S 037-58W,…
  20. HYDROLANT 2297/022002-10-17 → 2002-11-02
    Oceanographic operations 22 oct thru 01 nov by M/V antares in area bound by 21-55S 040-38W, 24-42S 029-10W,…
  21. HYDROLANT 2285/022002-10-15 → 2002-10-17
    Underwater operations in progress until 200300Z oct by M/V rou 22 oyarvide in area bound by 34-45.0S…
  22. HYDROLANT 2263/022002-10-12 → 2002-10-15
    Oceanographic operations 13 thru 20 oct by M/V almirante camara in area bound by 03-25S 037-58W, 04-33S…
  23. HYDROLANT 2214/022002-10-05 → 2002-10-11
    Oceanographic operations in progress until 10 oct by M/V almirante camara in area bound by 03-25S 037-58W,…
  24. HYDROLANT 2150/022002-09-25 → 2002-10-05
    Oceanographic operations in progress until 04 oct by M/V almirante camara in area bound by 03-25S 037-58W,…
  25. HYDROLANT 2039/022002-09-13 → 2002-09-25
    Oceanographic operations 14 thru 24 sep by M/V antares in area bound by 31-19S 050-45W, 33-00S 047-35W,…
  26. HYDROLANT 1937/022002-08-31 → 2002-09-15
    Oceanographic operations 02 thru 14 sep by M/V almirante camara in area bound by 03-25S 037-58W, 04-33S…
  27. HYDROLANT 1935/022002-08-31 → 2002-09-11
    Oceanographic operations 01 thru 10 sep by M/V antares in area bound by 32-35S 050-49W, 33-45S 048-29W,…
  28. HYDROLANT 1904/022002-08-28 → 2002-08-31
    Oceanographic operations in progress until 30 aug by M/V almirante camara in area bound by 03-12S 038-05W,…
  29. HYDROLANT 1837/022002-08-20 → 2002-08-28
    Oceanographic operations 23 thru 30 aug by M/V almirante camara in area bound by 04-34S 037-17W, 05-10S…
  30. HYDROLANT 1823/022002-08-17 → 2002-08-29
    Oceanographic operations 22 thru 28 aug by M/V antares in area bound by 35-21S 049-48W, 33-51S 053-00W,…
  31. HYDROLANT 1182/022002-05-28 → 2002-07-02
    Survey operations 281200Z may to 021030Z jun by M/V meteor in area bound by 11-40S 028-31W, 11-28S 034-13W,…
  32. HYDROLANT 1067/022002-05-09 → 2002-05-20
    Survey operations in progress until 201300Z may by M/V meteor along trackline joining 08-00N 035-00W, 00-45S…
  33. HYDROLANT 615/022002-03-16 → 2002-04-13
    Survey operations 19 mar thru 12 apr by M/V taurus in area bound by 20-59.9S 040-48.7W, 20-55.0S 040-47.3W,…
  34. HYDROLANT 554/022002-03-10 → 2002-04-11
    Survey operations in progress until further notice by M/V thales venturer towing 6000 meter long cable in…
  35. HYDROLANT 551/022002-03-10 → 2002-03-23
    Oceanographic operations 11 thru 22 mar by M/V antares in area bound by 06-20S 034-55W, 05-25S 032-13W,…
  36. HYDROLANT 420/022002-02-22 → 2002-03-08
    Oceanographic operations 25 feb thru 07 mar by M/V antares in area bound by 06-50S 032-35W, 06-50S 034-40W,…
  37. HYDROLANT 303/022002-02-06 → 2002-02-27
    Geophysical survey in progress until 28 feb by M/V thales venturer towing 6000 meter long cable in area…
  38. HYDROLANT 265/022002-02-02 → 2002-02-05
    Survey operations in progress until 04 feb by M/V ronald h. brown in area bound by 10-14.5S 035-51.8W,…
  39. HYDROLANT 190/022002-01-26 → 2002-02-02
    Survey operations 29 jan thru 01 feb by M/V ronald h. brown in area bound by 10-14.5S 035-51.8W, 11-28.0S…
  40. HYDROLANT 161/022002-01-23 → 2002-02-06
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  41. HYDROLANT 158/022002-01-22 → 2002-01-23
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  42. HYDROLANT 128/022002-01-18 → 2002-01-22
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  43. HYDROLANT 112/022002-01-16 → 2002-01-18
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  44. HYDROLANT 103/022002-01-15 → 2002-01-16
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  45. HYDROLANT 93/022002-01-13 → 2002-01-15
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  46. HYDROLANT 75/022002-01-11 → 2002-01-13
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  47. HYDROLANT 29/022002-01-06 → 2002-01-08
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable in…
  48. HYDROLANT 19/022002-01-04 → 2002-01-06
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  49. HYDROLANT 16/022002-01-04 → 2002-01-04
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…
  50. HYDROLANT 6/022002-01-03 → 2002-01-04
    Geophysical survey in progress until further notice by M/V thales venturer towing 6000 meter long cable…

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts and your national MSI service.

Survey operations in the South Atlantic Ocean — page 44 · seahazards