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 804/042004-05-11 → 2004-05-15
    Survey operations in progress until 150259Z may by M/V falcon explorer towing six 80 meter long cables in…
  2. HYDROLANT 785/042004-05-08 → 2004-05-11
    Survey operations in progress until 110259Z may by M/V falcon explorer towing six 80 meter long cables in…
  3. HYDROLANT 775/042004-05-07 → 2004-05-11
    Survey operations in progress until 110300Z may by M/V bergen surveyor towing 6000 meter long cable in area…
  4. HYDROLANT 761/042004-05-05 → 2004-05-13
    Survey operations in progress until 130259Z may by M/V ocean explorer towing 6000 meter long cable in area…
  5. HYDROLANT 760/042004-05-04 → 2004-05-08
    Survey operations in progress until 080259Z may by M/V falcon explorer towing six 80 meter long cables in…
  6. HYDROLANT 742/042004-05-01 → 2004-05-04
    Survey operations in progress until 040259Z may by M/V polar bjorn towing 50 meter long cable in area bound…
  7. HYDROLANT 741/042004-05-01 → 2004-05-04
    Survey operations in progress until 040259Z may by M/V falcon explorer towing six 80 meter long cables in…
  8. HYDROLANT 738/042004-05-01 → 2004-05-05
    Survey operations in progress until 050259Z may by M/V ocean explorer towing 6000 meter long cable in area…
  9. HYDROLANT 718/042004-04-28 → 2004-05-01
    Survey operations in progress until 010259Z may by M/V ocean explorer towing 6000 meter long cable in area…
  10. HYDROLANT 717/042004-04-28 → 2004-05-01
    Survey operations in progress until 010259Z may by M/V falcon explorer towing six 80 meter long cables in…
  11. HYDROLANT 713/042004-04-28 → 2004-05-01
    Survey operations in progress until 010259Z may by M/V polar bjorn towing 50 meter long cable in area bound…
  12. HYDROLANT 698/042004-04-25 → 2004-04-28
    Survey operations in progress until 280300Z apr by M/V falcon explorer towing six 80 meter long cables in…
  13. HYDROLANT 692/042004-04-24 → 2004-04-28
    Survey operations in progress until 280259Z apr by M/V ocean explorer towing 6000 meter long cable in area…
  14. HYDROLANT 690/042004-04-24 → 2004-04-27
    Survey operations in progress until 270259Z apr by M/V polar bjorn towing 50 meter long cable in area bound…
  15. HYDROLANT 676/042004-04-22 → 2004-04-24
    Survey operations in progress until 240259Z apr by M/V ocean explorer towing 6000 meter long cable in area…
  16. HYDROLANT 674/042004-04-22 → 2004-04-27
    Survey operations in progress until 250300Z apr by M/V falcon explorer towing six 80 meter long cables in…
  17. HYDROLANT 664/042004-04-20 → 2004-04-24
    Survey operations in progress until 240259Z apr by M/V polar bjorn towing 50 meter long cable in area bound…
  18. HYDROLANT 648/042004-04-19 → 2004-04-22
    Survey operations in progress until 220300Z apr by M/V ocean explorer towing 6000 meter long cable in area…
  19. HYDROLANT 645/042004-04-18 → 2004-04-21
    Survey operations in progress until 210300Z apr by M/V falcon explorer towing six 80 meter long cables in…
  20. HYDROLANT 630/042004-04-16 → 2004-04-19
    Survey operations in progress until 190300Z apr by M/V ocean explorer towing 6000 meter long cable in area…
  21. HYDROLANT 619/042004-04-14 → 2004-04-20
    Survey operations in progress until 200259Z apr by M/V polar bjorn towing 50 meter long cable in area bound…
  22. HYDROLANT 613/042004-04-13 → 2004-04-16
    Survey operations in progress until 160300Z apr by M/V ocean explorer towing 6000 meter long cable in area…
  23. HYDROLANT 612/042004-04-13 → 2004-04-18
    Survey operations in progress until 180300Z apr by M/V falcon explorer towing six 80 meter long cables in…
  24. HYDROLANT 597/042004-04-10 → 2004-04-13
    Survey operations in progress until 130300Z apr by M/V falcon explorer towing six 80 meter long cables in…
  25. HYDROLANT 595/042004-04-09 → 2004-04-13
    Survey operations in progress until 130300Z apr by M/V ocean explorer towing 6000 meter long cable in area…
  26. HYDROLANT 584/042004-04-08 → 2004-04-14
    Survey operations in progress until 140259Z apr by M/V polar bjorn towing 50 meter long cable in area bound…
  27. HYDROLANT 553/042004-04-03 → 2004-04-04
    Survey operations 040300Z to 070300Z apr by M/V falcon explorer towing 1000 meter long cables vicinity of…
  28. HYDROLANT 445/042004-03-19 → 2004-03-23
    Survey operations in progress until 230259Z mar by M/V polar bjorn towing 50 meter long cable in area bound…
  29. HYDROLANT 411/042004-03-13 → 2004-03-17
    Survey operations in progress until 180259Z mar by M/V polar bjorn towing 50 meter long cable in area bound…
  30. HYDROLANT 394/042004-03-09 → 2004-03-20
    Hydrographic survey in progress until 200300Z mar by M/V rou 22 oyarvide in area bound by 34-30.50S…
  31. HYDROLANT 385/042004-03-08 → 2004-03-13
    Survey operations in progress until 130259Z mar by M/V polar bjorn towing 50 meter long cable in area bound…
  32. HYDROLANT 352/042004-03-01 → 2004-03-08
    Survey operations in progress until 080259Z mar by M/V polar bjorn towing 50 meter long cable in area bound…
  33. HYDROLANT 306/042004-02-22 → 2004-02-27
    Survey operations in progress until 270259Z feb by M/V polar bjorn towing 50 meter long cable in area bound…
  34. HYDROLANT 293/042004-02-19 → 2004-02-22
    Survey operations in progress until 220259Z feb by M/V polar bjorn towing 50 meter long cable in area bound…
  35. HYDROLANT 278/042004-02-16 → 2004-02-19
    Survey operations in progress until 190259Z feb by M/V polar bjorn towing 50 meter long cable in area bound…
  36. HYDROLANT 263/042004-02-13 → 2004-02-17
    Survey operations in progress until 16 feb by M/V polar bjorn towing 50 meter long cable in area bound by…
  37. HYDROLANT 229/042004-02-08 → 2004-04-07
    Underwater operations in progress until further notice by M/V saipem 10000 in 06-01.4S 010-39.5E
  38. HYDROLANT 179/042004-01-30 → 2004-02-21
    Oceanographic operations 01 thru 20 feb by M/V antares in area bound by 23-00S 043-10W, 23-50S 040-00W,…
  39. HYDROLANT 150/042004-01-26 → 2004-01-28
    Underwater operations 28 jan thru 20 feb by M/V atalante in area bound by 00-00 000-00, 00-00 010-00W,…
  40. HYDROLANT 2212/032003-11-26 → 2003-11-28
    Hydrographic survey in progress until 290300Z nov by M/V rou 22 oyarvide in area bound by 34-30.50S…
  41. HYDROLANT 2153/032003-11-16 → 2003-11-28
    Oceanographic operations 19 thru 27 nov by M/V antares in area bound by 19-40S 039-30W, 19-00S 029-30W,…
  42. HYDROLANT 2057/032003-11-01 → 2003-11-15
    Oceanographic operations 03 thru 14 nov by M/V antares in area bound by 20-40S 040-00W, 20-40S 029-25W,…
  43. HYDROLANT 1992/032003-10-23 → 2003-11-17
    Oceanographic survey 26 oct thru 16 nov by M/V amorim do valle in area bound by 25-40.5S 048-25.0W, 25-37.0S…
  44. HYDROLANT 1989/032003-10-23 → 2003-11-01
    Hydrographic survey in progress until 010300Z nov by M/V rou 22 oyarvide in area bound by 34-47.0S…
  45. HYDROLANT 1956/032003-10-18 → 2003-11-01
    Oceanographic operations 19 thru 31 oct by M/V antares in area bound by 20-40S 040-00W, 21-30S 040-15W,…
  46. HYDROLANT 1853/032003-09-30 → 2003-10-16
    Oceanographic operations 05 thru 15 oct by M/V antares in area bound by 23-10S 042-00W, 24-45S 029-10W,…
  47. HYDROLANT 1738/032003-09-11 → 2003-09-16
    Hydrographic survey in progress until 162100Z sep by M/V rou 22 oyarvide in area bound by 34-54.4S…
  48. HYDROLANT 1660/032003-08-31 → 2003-09-15
    Survey operations 01 thru 14 sep by M/V taurus in area bound by 12-53S 038-38W, 12-54S 038-40W, 12-54S…
  49. HYDROLANT 1624/032003-08-25 → 2003-08-26
    Oceanographic operations in progress until further notice by M/V puerto deseado in area bound by 37-01S…
  50. HYDROLANT 1593/032003-08-21 → 2003-08-25
    Oceanographic operations in progress until 24 aug by M/V puerto deseado in area bound by 38-08S 057-27W,…

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 43 · seahazards