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 2749/152015-11-09 → 2015-11-13
    Underwater operations in progress until further notice by: a. M/V gariep in 28-30.0S 015-49.0E
    Eastern South Atlantic · Namibia
  2. HYDROLANT 2734/152015-11-07 → 2015-12-01
    Underwater operations in progress until 30 nov by M/V apocalipse h and M/V eco maritmo in 23-54.12S 045-33.48W
    Brazil-south Coast
  3. HYDROLANT 2696/152015-11-02 → 2015-11-09
    Underwater operations in progress until further notice by: a. M/V gariep in 28-30.0S 015-49.0E
    Eastern South Atlantic · Namibia
  4. HYDROLANT 2661/152015-10-27 → 2015-10-30
    Underwater operations 1100Z to 1900Z daily 26 thru 30 oct within three miles of 07-56.77S 034-32.50W
    Brazil-northeast Coast
  5. HYDROLANT 2626/152015-10-23 → 2015-10-26
    Underwater operations 1100Z to 1900Z daily 23 thru 26 oct within three miles of 07-56.77S 034-32.50W
    Brazil-northeast Coast
  6. HYDROLANT 2590/152015-10-17 → 2015-10-20
    Underwater operations 201100Z to 201700Z oct by M/V annangel innovation in 20-43.13S 040-25.04W
    Brazil-southeast Coast
  7. HYDROLANT 2544/152015-10-12 → 2015-11-02
    Underwater operations in progress until further notice by: a. M/V gariep in 28-30.0S 015-49.0E
    Eastern South Atlantic · Namibia
  8. HYDROLANT 2484/152015-10-04 → 2015-10-05
    Underwater operations 0900Z to 2100Z daily 04 and 05 oct by M/V zm drakar in 21-07.04S 040-25.50W
    Brazil-southeast Coast
  9. HYDROLANT 2470/152015-10-02 → 2015-10-04
    Underwater operations 1100Z to 2100Z daily 03 thru 05 oct by M/V zm drakar in 21-07.04S 040-25.50W
    Brazil-southeast Coast
  10. HYDROLANT 2363/152015-09-21 → 2015-10-12
    Underwater operations in progress until further notice by: a. M/V gariep in 28-30.0S 015-49.0E
    Eastern South Atlantic · Namibia
  11. HYDROLANT 2280/152015-09-14 → 2015-09-21
    Underwater operations in progress until further notice by: a. M/V gariep in 28-30.0S 015-49.0E
    Eastern South Atlantic · Namibia
  12. HYDROLANT 2249/152015-09-11 → 2015-09-14
    Underwater operations in progress until further notice by: a. M/V gariep in 28-30.0S 015-49.0E
    Eastern South Atlantic · Namibia
  13. HYDROLANT 2233/152015-09-09 → 2015-09-11
    Underwater operations in progress until further notice by: a. M/V gariep in 28-30.0S 015-49.0E
    Eastern South Atlantic · Namibia
  14. HYDROLANT 2177/152015-09-03 → 2016-04-02
    Underwater operations 1100Z to 2300Z daily 03 sep thru 01 apr 16 by M/V ankh and M/V oceanica sub II in area…
    Brazil-northeast Coast
  15. HYDROLANT 2095/152015-08-26 → 2015-09-09
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-34.0S 015-55.0E
    Eastern South Atlantic · Namibia
  16. HYDROLANT 2061/152015-08-21 → 2015-08-26
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-42.9S 015-55.4E
    Eastern South Atlantic · Namibia
  17. HYDROLANT 1829/152015-07-25 → 2015-08-21
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-37.2S 015-56.0E
    Eastern South Atlantic · Namibia
  18. HYDROLANT 1519/152015-06-21 → 2015-07-25
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-32.2S 015-56.6E
    Eastern South Atlantic · Namibia
  19. HYDROLANT 1476/152015-06-17 → 2015-06-21
    Underwater operations in progress until further notice by: a. M/V gariep in 28-36-42S 015-54-00E
    Eastern South Atlantic · Namibia
  20. HYDROLANT 1375/152015-06-06 → 2015-06-30
    Underwater operations 1100Z to 2100Z daily 08 thru 30 jun in 20-19.0S 040-09.6W
    Brazil-southeast Coast
  21. HYDROLANT 1353/152015-06-04 → 2015-08-25
    Survey operations in progress until 250259Z aug by M/V ridley thomas in area bound by 03-43.63S 038-15.43W,…
    Western South Atlantic · Brazil
  22. HYDROLANT 1331/152015-06-01 → 2015-06-17
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-37.0S 015-53.0E
    Eastern South Atlantic · Namibia
  23. HYDROLANT 1271/152015-05-23 → 2015-06-15
    Underwater operations 260600Z may to 151800Z jun by M/V bourbon atlas within two miles of 01-09.3S 008-28.5E
    Eastern South Atlantic · Gabon
  24. HYDROLANT 1263/152015-05-22 → 2015-06-01
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-41.0S 016-07.0E
    Eastern South Atlantic · Namibia
  25. HYDROLANT 1217/152015-05-18 → 2015-06-10
    Oceanographic operations in progress until further notice by M/V oyarvide in area bound by 34-15S 053-20W,…
    Western South Atlantic · Uruguay
  26. HYDROLANT 1198/152015-05-16 → 2015-11-17
    Hydrographic survey 160900Z may to 170450Z nov by M/V celia in area bound by 25-50S 045-00W, 25-50S 041-30W,…
    Brazil-southeast Coast
  27. HYDROLANT 1157/152015-05-12 → 2015-05-22
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-37.0S 015-51.0E
    Eastern South Atlantic · Namibia
  28. HYDROLANT 1121/152015-05-07 → 2015-05-12
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-37S 015-51E
    Eastern South Atlantic · Namibia
  29. HYDROLANT 1017/152015-04-27 → 2015-05-07
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-32.0S 015-50.0E
    Eastern South Atlantic · Namibia
  30. HYDROLANT 913/152015-04-16 → 2015-05-01
    Underwater operations 180300Z apr to 010300Z may by vessel dsv wyatt candies in 19-31.85S 039-15.45W
    Brazil-east Coast
  31. HYDROLANT 824/152015-04-09 → 2015-05-01
    Underwater operations 12 thru 30 apr by vessel jin xia feng in 20-19.12S 040-03.00W
    Brazil-southeast Coast
  32. HYDROLANT 809/152015-04-07 → 2015-04-27
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-32.0S 015-50.0E
    Eastern South Atlantic · Namibia
  33. HYDROLANT 753/152015-03-30 → 2015-04-07
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-32.0S 015-50.0E
    Eastern South Atlantic · Namibia
  34. HYDROLANT 667/152015-03-19 → 2015-03-26
    Underwater operations in progress until 25 mar by M/V apocalipse h and M/V seamar III in 20-25.13S 040-12.00W
    Brazil-southeast Coast
  35. HYDROLANT 657/152015-03-18 → 2015-03-19
    Underwater operations in progress until 25 mar by M/V apocalipse h and M/V seamar III in 03-40.11S 038-27.68W
    Brazil-southeast Coast
  36. HYDROLANT 651/152015-03-17 → 2015-06-12
    Survey operations in progress until 11 jun by M/V sp exodo in area bound by 03-45.66S 038-26.32W, 03-45.69S…
    Western South Atlantic · Brazil-north Coast
  37. HYDROLANT 644/152015-03-17 → 2015-03-18
    Underwater operations 17 thru 25 mar by vessel apocalipse h and seamar III in 20-25.13S 040-12.00W
    Brazil-southeast Coast
  38. HYDROLANT 591/152015-03-11 → 2015-03-30
    Underwater operations in progress until further notice by: a. M/V gariep in 28-41.0S 016-10.6E
    Eastern South Atlantic · Namibia
  39. HYDROLANT 519/152015-03-03 → 2015-03-11
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-38.0S 015-52.0E
    Eastern South Atlantic · Namibia
  40. HYDROLANT 491/152015-02-27 → 2015-03-03
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-38S 015-52E
    Eastern South Atlantic · Namibia
  41. HYDROLANT 440/152015-02-21 → 2015-03-20
    Underwater operations 1100Z to 2100Z daily 25 feb thru 20 mar by vessel bravamar XV in 20-17.07S 040-06.05W
    Brazil-southeast Coast
  42. HYDROPAC 559/152015-02-17 → 2015-04-04
    Underwater operations 19 feb thru 03 apr by M/V l atalante along trackline between 19-00S 155-00E and 19-00S…
    South Pacific
  43. HYDROLANT 293/152015-02-04 → 2015-04-11
    Underwater operations in progress until 10 apr by vessel oceanica II and vessel asso ventisette within 0.5…
    Brazil-north Coast
  44. HYDROLANT 224/152015-01-27 → 2015-02-15
    Underwater operations 1000Z to 2000Z daily 29 jan thru 15 feb by M/V nirvana in 19-50S 040-00W
    Brazil-east Coast
  45. HYDROLANT 223/152015-01-27 → 2015-02-15
    Underwater operations 1000Z to 2000Z daily in progress until 15 feb by M/V rr europa in 20-20.00S 040-09.33W
    Brazil-southeast Coast
  46. HYDROLANT 215/152015-01-26 → 2015-02-27
    Underwater operations in progress until further notice by: a. M/V gariep in 28-41.0S 016-10.6E
    Eastern South Atlantic · Namibia
  47. HYDROLANT 207/152015-01-25 → 2015-02-04
    Underwater operations in progress until 10 mar by vessel oceanica II and vessel asso ventisette within 0.5…
    Brazil-north Coast
  48. HYDROLANT 206/152015-01-24 → 2015-01-26
    Underwater operations in progress until further notice by: a. M/V gariep in 28-41S 016-10.6E
    Eastern South Atlantic · Namibia
  49. HYDROLANT 161/152015-01-19 → 2015-01-31
    Underwater operations in progress until 310600Z jan by M/V ocean observer in: a. 06-19.28S 011-16.78E
    Eastern South Atlantic · Angola
  50. HYDROLANT 132/152015-01-15 → 2015-01-24
    Underwater operations in progress until further notice by: a. M/V gariep in 28-41.0S 016-10.6E
    Eastern South Atlantic · Namibia

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 34 · seahazards