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 1735/132013-07-18 → 2013-10-21
    Underwater operations in progress until further notice by M/V gariep in 28-36.7S 015-52.1E
    Eastern South Atlantic · Namibia
  2. HYDROPAC 2105/132013-07-17 → 2013-08-26
    Underwater operations 22 jul thru 25 aug along trackline between 03-00S 175-00E and 15-00S 174-00W
    Western South Pacific
  3. HYDROLANT 1682/132013-07-12 → 2013-07-19
    Underwater operations in progress until further notice by M/V coral sea in 28-31.1S 015-55.3E
    Eastern South Atlantic · Namibia
  4. HYDROLANT 1657/132013-07-09 → 2013-07-12
    Underwater operations in progress until further notice by M/V coral sea in 28-27.4S 015-49.3E
    Eastern South Atlantic · Namibia
  5. HYDROLANT 1614/132013-07-04 → 2013-09-16
    Underwater operations in progress until further notice by M/V mafuta in 28-33S 015-57E
    Eastern South Atlantic · Namibia
  6. HYDROLANT 1595/132013-07-02 → 2013-07-09
    Underwater operations in progress until further notice by M/V coral sea in 28-26.5S 015-49.3E
    Eastern South Atlantic · Namibia
  7. HYDROLANT 1592/132013-07-02 → 2013-11-16
    Survey operations in progress until further notice by M/V explorer in area bound by 27-13.1S 015-12.5E,…
    Eastern South Atlantic · Namibia
  8. HYDROLANT 1444/132013-06-12 → 2013-07-02
    Survey operations in progress until further notice by M/V explorer in area bound by 26-53.92S 015-03.38E,…
    Eastern South Atlantic · Namibia
  9. HYDROLANT 1401/132013-06-06 → 2013-07-11
    Underwater operations in progress until further notice by M/V gariep in 28-33S 015-54E
    Eastern South Atlantic · Namibia
  10. HYDROLANT 1378/132013-06-04 → 2013-07-02
    Underwater operations in progress until further notice by M/V coral sea in 28-40.4S 015-59.3E
    Eastern South Atlantic · Namibia
  11. HYDROLANT 1369/132013-06-03 → 2013-06-12
    Survey operations in progress until further notice by M/V explorer in area bound by 27-13.5S 015-10.8E,…
    Eastern South Atlantic · Namibia
  12. HYDROLANT 1341/132013-05-31 → 2013-06-02
    Survey operations in progress until 01 jun by M/V ramform vanguard towing 12 7000 meter long cables along…
    Western South Atlantic · Uruguay
  13. HYDROLANT 1335/132013-05-30 → 2013-06-04
    Underwater operations in progress until further notice by M/V coral sea in 28-41.0S 015-57.6E two mile berth…
    Eastern South Atlantic · Namibia
  14. HYDROLANT 1248/132013-05-20 → 2013-05-31
    Underwater operations in progress until further notice by M/V coral sea in 28-40.3S 015-57.1E
    Eastern South Atlantic · Namibia
  15. HYDROLANT 1172/132013-05-10 → 2013-06-07
    Underwater operations in progress until further notice by M/V bar protector in area bound by 11-04.0S…
    Eastern South Atlantic · Angola
  16. HYDROLANT 1101/132013-05-02 → 2013-05-15
    Underwater operations in progress until further notice by M/V explorer in area bound by 27-26.7S 015-16.9E,…
    Eastern South Atlantic · Namibia
  17. HYDROLANT 1087/132013-04-30 → 2013-05-02
    Underwater operations in progress until further notice by M/V explorer in area bound by 27-27S 015-17E,…
    Eastern South Atlantic · Namibia
  18. HYDROLANT 1020/132013-04-23 → 2013-07-04
    Underwater operations in progress until further notice by M/V peace in africa in 28-27S 015-54E
    Eastern South Atlantic · Namibia
  19. HYDROLANT 1012/132013-04-22 → 2013-05-20
    Underwater operations in progress until further notice by M/V coral sea in 28-36.9S 015-52.5E
    Eastern South Atlantic · Namibia
  20. HYDROLANT 903/132013-04-11 → 2013-07-12
    Underwater operations in progress until 11 jul vicinity 22-08.15S 040-00.13W
    Brazil-southeast Coast
  21. HYDROLANT 902/132013-04-11 → 2013-07-12
    Underwater operations in progress until 11 jul vicinity 22-23.15S 040-08.23W
    Brazil-southeast Coast
  22. HYDROLANT 890/132013-04-09 → 2013-04-22
    Underwater operations in progress until further notice by M/V coral sea in 28-40.4S 015-57.1E
    Eastern South Atlantic · Namibia
  23. HYDROLANT 845/132013-04-03 → 2013-04-08
    Underwater operations in progress until 082100Z apr in area bound by 21-58.8S 040-49.1W, 21-59.5S 040-49.7W,…
    Brazil-southeast Coast
  24. HYDROLANT 737/132013-03-23 → 2013-04-01
    Underwater operations 230900Z mar to 010300Z apr vicinity 26-27.15S 046-33.77W
    Brazil-south Coast
  25. HYDROLANT 472/132013-02-21 → 2013-04-20
    Hydrographic survey in progress until 19 apr by M/V pericuma I in area bound by 01-43.75S 043-53.32W,…
    Brazil-north Coast
  26. HYDROLANT 464/132013-02-20 → 2013-04-09
    Underwater operations in progress until further notice by M/V coral sea in 28-39.0S 016-07.5E
    Eastern South Atlantic · Namibia
  27. HYDROLANT 448/132013-02-19 → 2013-03-11
    Underwater operations in progress until 10 mar in area between 26-27.13S 046-33.72W, 26-26.18S 046-32.43W,…
    Brazil-south Coast
  28. HYDROLANT 423/132013-02-16 → 2013-02-21
    Hydrographic survey 18 thru 25 feb by M/V pericuma I in area bound by 01-43.75S 043-53.32W, 01-47.83S…
    Brazil-north Coast
  29. HYDROLANT 266/132013-01-29 → 2013-05-29
    Survey operations in progress until further notice by M/V pgs apollo towing ten cables in area bound by…
    Eastern South Atlantic · Angola
  30. HYDROLANT 237/132013-01-26 → 2013-04-07
    Underwater operations in progress until 06 apr in area bound by 25-24.85S 042-44.68W, 25-24.88S 042-44.73W,…
    Brazil-south Coast
  31. HYDROLANT 227/132013-01-25 → 2013-02-20
    Underwater operations in progress until further notice by M/V coral sea in 28-35.5S 015-51.6E
    Eastern South Atlantic · Namibia
  32. HYDROLANT 224/132013-01-25 → 2013-06-06
    Underwater operations in progress until further notice by M/V gariep in 28-33S 015-54E
    Eastern South Atlantic · Namibia
  33. HYDROLANT 202/132013-01-23 → 2014-03-01
    Underwater operations in progress until 26 nov 14 by dredge balder in area bound by 21-46.93S 040-44.99W,…
    Brazil-southeast Coast
  34. HYDROLANT 150/132013-01-17 → 2013-03-18
    One mile berth requested
    Eastern South Atlantic · Namibia
  35. HYDROLANT 31/132013-01-03 → 2013-01-24
    Underwater operations in progress until further notice by M/V coral sea in 28-36.0S 015-51.8E
    Eastern South Atlantic · Namibia
  36. HYDROLANT 3090/122012-12-31 → 2013-04-24
    1 underwater operations in progress until further notice by M/V peace in africa in 28-27S 015-54E
    Eastern South Atlantic · Namibia
  37. HYDROLANT 3088/122012-12-31 → 2012-12-31
    Underwater operations in progress until further notice by M/V peace in africa in 28-27S 015-54E
    Eastern South Atlantic · Namibia
  38. HYDROLANT 3042/122012-12-27 → 2013-01-03
    Underwater operations in progress until further notice by M/V coral sea in 28-23.8S 015-52.3E
    Eastern South Atlantic · Namibia
  39. HYDROLANT 3029/122012-12-24 → 2012-12-27
    Underwater operations in progress until further notice by M/V coral sea in 28-26.5S 015-52.3E
    Eastern South Atlantic · Namibia
  40. HYDROLANT 3024/122012-12-23 → 2012-12-28
    Survey operations in progress until further notice by M/V wg amundsen towing ten 2600 meter long cables in…
    Eastern South Atlantic · Angola
  41. HYDROLANT 3010/122012-12-21 → 2013-01-16
    Survey operations in progress until further notice by M/V northern explorer towing 10000 meter long cable in…
    Eastern South Atlantic · South Africa-west Coast
  42. HYDROLANT 3002/122012-12-20 → 2012-12-24
    Underwater operations in progress until further notice by M/V coral sea in 28-24.5S 015-51.1E
    Eastern South Atlantic · Namibia
  43. HYDROLANT 2979/122012-12-18 → 2012-12-20
    Underwater operations in progress until further notice by M/V coral sea in 28-34.2S 015-50.9E
    Eastern South Atlantic · Namibia
  44. HYDROLANT 2920/122012-12-10 → 2012-12-12
    Underwater operations in progress until 11 dec by M/V dsv acergy harrier in 26-28.62S 046-33.60W
    Brazil-south Coast
  45. HYDROLANT 2838/122012-12-01 → 2012-12-10
    Underwater operations 0900Z to 2000Z daily 03 thru 10 dec by M/V abaete within five miles of 19-27S 039-39W
    Brazil-east Coast
  46. HYDROLANT 2781/122012-11-25 → 2012-12-27
    Survey operations in progress until further notice by M/V bavenit in areas bound by: a. 06-10.1S 011-08.5E,…
    Eastern South Atlantic · Angola
  47. HYDROLANT 2680/122012-11-12 → 2012-12-31
    Underwater operations in progress until further notice by M/V peace in africa in 28-24S 016-09E
    Eastern South Atlantic · Namibia
  48. HYDROLANT 2661/122012-11-09 → 2012-11-19
    Hydrographic survey 14 thru 18 nov by M/V ocean stalwart along trackline joining 00-30.3S 043-45.5W,…
    Brazil-north Coast
  49. HYDROLANT 2385/122012-10-11 → 2012-11-12
    Underwater operations in progress until further notice by M/V peace in africa in 28-24S 015-51E
    Eastern South Atlantic · Namibia
  50. HYDROLANT 2354/122012-10-08 → 2012-12-21
    Underwater operations in progress until further notice by M/V gariep in 28-40.7S 015-56.7E
    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 37 · seahazards