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 884/142014-04-01 → 2014-04-02
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 55-06.8S 066-01.4W
    Western South Atlantic · Drake Passage · Argentina-southeast Coast
  2. HYDROLANT 882/142014-03-31 → 2014-04-16
    Survey operations in progress until further notice by M/V bgp challenger towing 11000 meter long cable in…
    Eastern South Atlantic · Namibia
  3. HYDROLANT 870/142014-03-31 → 2014-04-01
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 55-06.8S 066-01.4W
    Western South Atlantic · Drake Passage · Argentina-southeast Coast
  4. HYDROLANT 839/142014-03-26 → 2014-04-01
    Underwater operations in progress until further notice by M/V coral sea in 28-40S 016-10E
    Eastern South Atlantic · Namibia
  5. HYDROLANT 827/142014-03-24 → 2014-05-10
    Underwater operations in progress until further notice by M/V mafuta in 28-27S 015-53E
    Eastern South Atlantic · Namibia
  6. HYDROLANT 768/142014-03-17 → 2014-03-19
    Oceanographic operations in progress until further notice by M/V puerto deseado in 57-08.3S 054-44.1W
    Western South Atlantic · Scotia Sea
  7. HYDROLANT 763/142014-03-17 → 2014-05-10
    Underwater operations in progress until further notice by M/V gariep in 28-35.5S 015-51.1E
    Eastern South Atlantic · Namibia
  8. HYDROLANT 757/142014-03-16 → 2014-03-17
    Oceanographic operations in progress until further notice by M/V puerto deseado in 59-20.4S 049-16.8W
    Antarctica · Scotia Sea
  9. HYDROLANT 617/142014-02-28 → 2014-03-24
    Underwater operations in progress until further notice by M/V mafuta in 28-30S 015-50E
    Eastern South Atlantic · Namibia
  10. HYDROLANT 587/142014-02-25 → 2014-03-26
    Underwater operations in progress until further notice by M/V coral sea in 28-36.1S 015-55.5E
    Eastern South Atlantic · Namibia
  11. HYDROLANT 574/142014-02-24 → 2014-02-28
    Underwater operations in progress until further notice by M/V mafuta in 28-26S 015-49E
    Eastern South Atlantic · Namibia
  12. HYDROLANT 534/142014-02-21 → 2014-03-17
    Underwater operations in progress until further notice by M/V gariep in 28-36.8S 015-53.0E
    Eastern South Atlantic · Namibia
  13. HYDROLANT 511/142014-02-19 → 2014-02-21
    Underwater operations in progress until further notice by M/V gariep in 28-36.8S 015-53.0E
    Eastern South Atlantic · Namibia
  14. HYDROLANT 475/142014-02-16 → 2014-02-17
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 59-07.2S 045-59.7W
    Western South Atlantic · Scotia Sea
  15. HYDROLANT 465/142014-02-15 → 2014-02-16
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 58-39.2S 052-49.1W
    Western South Atlantic · Scotia Sea
  16. HYDROLANT 461/142014-02-14 → 2014-02-15
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 57-33.5S 059-06.4W
    Western South Atlantic · Scotia Sea
  17. HYDROLANT 453/142014-02-14 → 2014-02-25
    Underwater operations in progress until further notice by M/V coral sea in 28-31.0S 015-49.3E
    Eastern South Atlantic · Namibia
  18. HYDROLANT 447/142014-02-13 → 2014-02-14
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 55-32.5S 064-45.4W
    Western South Atlantic · Drake Passage
  19. HYDROLANT 346/142014-02-04 → 2014-02-05
    Oceanographic operations in progress until further notice by M/V ara puerto deseado vicinity 56-31.9S…
    Western South Atlantic · Drake Passage
  20. HYDROLANT 326/142014-02-03 → 2014-02-04
    Oceanographic operations in progress until further notice by M/V ara puerto deseado vicinity 59-46.7S…
    Antarctica · Drake Passage
  21. HYDROLANT 261/142014-01-28 → 2014-02-24
    Underwater operations in progress until further notice by M/V mafuta in 28-28S 015-54E
    Eastern South Atlantic · Namibia
  22. HYDROLANT 138/142014-01-14 → 2014-02-14
    Underwater operations in progress until further notice by M/V coral sea in 28-39.1S 016-09.4E
    Eastern South Atlantic · Namibia
  23. HYDROLANT 11/142014-01-02 → 2014-02-19
    Underwater operations in progress until further notice by M/V gariep in 28-36.8S 015-52.8E
    Eastern South Atlantic · Namibia
  24. HYDROLANT 10/142014-01-02 → 2014-01-02
    Underwater operations in progress until further notice by M/V gariep in 28-36.8S 015-52.8E
    Eastern South Atlantic · Namibia
  25. HYDROLANT 3387/132013-12-31 → 2014-01-14
    Underwater operations in progress until further notice by M/V coral sea in 28-30.8S 015-55.0E
    Eastern South Atlantic · Namibia
  26. HYDROLANT 3354/132013-12-27 → 2013-12-31
    Underwater operations in progress until further notice by M/V coral sea in 28-25.6S 015-48.7E
    Eastern South Atlantic · Namibia
  27. HYDROLANT 3263/132013-12-18 → 2013-12-27
    Underwater operations in progress until further notice by M/V coral sea in 28-27.6S 015-54.3E
    Eastern South Atlantic · Namibia
  28. HYDROLANT 3212/132013-12-12 → 2013-12-18
    Underwater operations in progress until further notice by M/V coral sea in 28-33.2S 015-56.5E
    Eastern South Atlantic · Namibia
  29. HYDROLANT 3073/132013-11-30 → 2014-02-15
    Underwater operations 0900Z to 2100Z daily until 15 feb 14 by M/V oceanica with submersibles in 18-58.68S…
    Brazil-east Coast
  30. HYDROLANT 3064/132013-11-30 → 2013-11-30
    Underwater operations 0800Z to 2000Z daily until 15 feb 14 by M/V oceanica with submersibles in 18-58.41S…
    Brazil-east Coast
  31. HYDROLANT 3047/132013-11-29 → 2014-01-28
    Underwater operations in progress until further notice by M/V mafuta in 28-35S 015-57E
    Eastern South Atlantic · Namibia
  32. HYDROLANT 2908/132013-11-18 → 2013-11-29
    Underwater operations in progress until further notice by M/V mafuta in 28-40S 016-09E
    Eastern South Atlantic · Namibia
  33. HYDROLANT 2907/132013-11-18 → 2013-12-12
    Underwater operations in progress until further notice by M/V coral sea in 28-25.9S 015-51.9E
    Eastern South Atlantic · Namibia
  34. HYDROLANT 2759/132013-11-04 → 2013-11-18
    Underwater operations in progress until further notice by M/V coral sea in 28-27.5S 015-52.5E
    Eastern South Atlantic · Namibia
  35. HYDROLANT 2700/132013-10-28 → 2014-01-02
    Underwater operations in progress until further notice by M/V gariep in 28-35.0S 015-57.7E
    Eastern South Atlantic · Namibia
  36. HYDROLANT 2667/132013-10-25 → 2013-11-04
    Underwater operations in progress until further notice by M/V coral sea in 28-36.2S 015-54.9E
    Eastern South Atlantic · Namibia
  37. HYDROLANT 2632/132013-10-21 → 2013-10-25
    Underwater operations in progress until further notice by M/V coral sea in 28-28.7S 015-54.6E
    Eastern South Atlantic · Namibia
  38. HYDROLANT 2581/132013-10-17 → 2013-10-21
    Underwater operations in progress until further notice by M/V coral sea in 28-28.5S 015-54.5E
    Eastern South Atlantic · Namibia
  39. HYDROLANT 2518/132013-10-11 → 2013-11-08
    B. 20-07.9S 011-08.4E
    Eastern South Atlantic · Namibia
  40. HYDROLANT 2496/132013-10-09 → 2013-11-18
    Underwater operations in progress until further notice by M/V mafuta in 28-28S 015-49E
    Eastern South Atlantic · Namibia
  41. HYDROLANT 2441/132013-10-03 → 2013-10-31
    Underwater operations 1100Z to 2000Z daily 04 thru 31 oct by M/V astro enchova in 20-20.90S 040-15.33W
    Brazil-southeast Coast
  42. HYDROLANT 2419/132013-09-30 → 2013-10-09
    Underwater operations in progress until further notice by M/V mafuta in 28-32S 015-54E
    Eastern South Atlantic · Namibia
  43. HYDROLANT 2336/132013-09-21 → 2013-09-27
    Underwater operations 0930Z to 2030Z daily 23 thru 27 sep vicinty of trackline joining 20-20.40S 040-12.51W,…
    Brazil-southeast Coast
  44. HYDROLANT 2277/132013-09-16 → 2013-09-30
    Underwater operations in progress until further notice by M/V mafuta in 28-34S 015-55E
    Eastern South Atlantic · Namibia
  45. HYDROLANT 2245/132013-09-13 → 2014-05-03
    Brazil-southeast Coast
  46. HYDROLANT 2093/132013-08-28 → 2013-12-28
    Survey operations 0800Z to 2200Z daily 28 aug thru 28 dec in area bound by 20-29.88S 040-19.38W, 20-30.55S…
    Brazil-southeast Coast
  47. HYDROLANT 2048/132013-08-21 → 2013-10-17
    Underwater operations in progress until further notice by M/V coral sea in 28-28.4S 015-47.3E
    Eastern South Atlantic · Namibia
  48. HYDROLANT 1969/132013-08-12 → 2013-08-21
    Underwater operations in progress until further notice by M/V coral sea in 28-29.4S 015-49.7E
    Eastern South Atlantic · Namibia
  49. HYDROLANT 1899/132013-08-05 → 2013-08-12
    Underwater operations in progress until further notice by M/V coral sea in 28-39.0S 015-55.4E
    Eastern South Atlantic · Namibia
  50. HYDROLANT 1747/132013-07-19 → 2013-08-05
    Underwater operations in progress until further notice by M/V coral sea in 28-39.8S 015-55.5E
    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 36 · seahazards