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
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Other hazards in the South Atlantic Ocean

Archive · 2,275 cancelled

  1. HYDROLANT 1961/172017-06-26 → 2017-06-27
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  2. HYDROLANT 1948/172017-06-24 → 2017-07-02
    Survey operations in progress until 01 jul by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-southeast Coast
  3. HYDROLANT 1945/172017-06-23 → 2017-06-26
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  4. HYDROLANT 1939/172017-06-23 → 2017-07-05
    Survey operations 241800Z jun until further notice by M/V osprey explorer towing 10000 meter long cable in…
    Eastern South Atlantic
  5. HYDROLANT 1932/172017-06-23 → 2017-06-23
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  6. HYDROLANT 1926/172017-06-22 → 2017-06-23
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  7. HYDROLANT 1922/172017-06-22 → 2017-06-22
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  8. HYDROLANT 1909/172017-06-21 → 2017-06-22
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  9. HYDROLANT 1906/172017-06-20 → 2017-06-21
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  10. HYDROLANT 1901/172017-06-20 → 2017-06-25
    Underwater operations in progress until 242359Z jun by M/V navio lorelay in 23-02.1S 042-39.8W
    Western South Atlantic · Brazil-south Coast
  11. HYDROLANT 1891/172017-06-18 → 2017-06-20
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  12. HYDROLANT 1886/172017-06-17 → 2017-06-18
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  13. HYDROLANT 1882/172017-06-16 → 2017-06-25
    Survey operations 17 thru 24 jun by M/V oceanic champion towing 12 9260 meter long cables in area bound by…
    Western South Atlantic · Brazil-southeast Coast
  14. HYDROLANT 1874/172017-06-16 → 2017-06-17
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  15. HYDROLANT 1864/172017-06-15 → 2017-06-16
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  16. HYDROLANT 1863/172017-06-15 → 2017-12-30
    Underwater operations 1000Z to 2000Z daily 15 jun thru 30 dec by M/V dilen tide in area bound by 03-05.46S…
    Western South Atlantic · Brazil-north Coast
  17. HYDROLANT 1856/172017-06-14 → 2017-06-15
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  18. HYDROLANT 1846/172017-06-13 → 2017-07-10
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-41.0S 015-56.0E
    Eastern South Atlantic · Namibia
  19. HYDROLANT 1819/172017-06-10 → 2017-06-14
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  20. HYDROLANT 1815/172017-06-10 → 2017-06-18
    Survey operations in progress until 17 jun by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-south Coast
  21. HYDROLANT 1808/172017-06-09 → 2017-06-10
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  22. HYDROLANT 1786/172017-06-07 → 2017-06-13
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-35.4S 015-48.8E
    Eastern South Atlantic · Namibia
  23. HYDROLANT 1766/172017-06-05 → 2017-06-09
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  24. HYDROLANT 1753/172017-06-03 → 2017-06-05
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  25. HYDROLANT 1750/172017-06-03 → 2017-06-11
    Survey operations in progress until 10 jun by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-south Coast
  26. HYDROLANT 1731/172017-06-02 → 2017-06-03
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  27. HYDROLANT 1729/172017-06-01 → 2017-06-02
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  28. HYDROLANT 1700/172017-05-31 → 2017-06-01
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  29. HYDROLANT 1689/172017-05-30 → 2017-05-31
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  30. HYDROLANT 1681/172017-05-29 → 2017-06-07
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-30.7S 015-49.7E
    Eastern South Atlantic · Namibia
  31. HYDROLANT 1673/172017-05-28 → 2017-05-29
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  32. HYDROLANT 1670/172017-05-28 → 2017-05-28
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  33. HYDROLANT 1661/172017-05-27 → 2017-06-04
    Survey operations in progress until 03 jun by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-south Coast
  34. HYDROLANT 1660/172017-05-26 → 2017-05-28
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  35. HYDROLANT 1598/172017-05-22 → 2017-05-22
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  36. HYDROLANT 1588/172017-05-20 → 2017-05-28
    Survey operations in progress until 27 may by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-south Coast
  37. HYDROLANT 1531/172017-05-15 → 2017-05-22
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  38. HYDROLANT 1516/172017-05-14 → 2017-06-12
    Survey operations in progress until further notice by M/V osprey explorer towing 12000 meter long cable in…
    Eastern South Atlantic · Gulf of Guinea · Gabon
  39. HYDROLANT 1515/172017-05-14 → 2017-05-15
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  40. HYDROLANT 1510/172017-05-13 → 2017-06-01
    Survey operations in progress until 312359Z may by M/V polarcus alima towing six 3300 meter long cables in…
    Eastern South Atlantic · Angola
  41. HYDROLANT 1505/172017-05-13 → 2017-05-21
    Survey operations in progress until 20 may by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-south Coast
  42. HYDROLANT 1456/172017-05-08 → 2017-05-13
    Survey operations in progress until 312359Z may by M/V polarcus alima towing six 3300 meter long cables in…
    Eastern South Atlantic · Angola
  43. HYDROLANT 1434/172017-05-05 → 2017-05-14
    Survey operations 06 thru 13 may by M/V oceanic champion towing 12 9260 meter long cables in area bound by…
    Western South Atlantic · Brazil-south Coast
  44. HYDROLANT 1377/172017-04-30 → 2017-05-04
    Survey operations in progress until further notice by M/V ara puerto deseado in area bound by 55-00.0S…
    Western South Atlantic · Scotia Sea · Drake Passage · Argentina
  45. HYDROLANT 1355/172017-04-28 → 2017-05-07
    Survey operations 29 apr thru 06 may by M/V oceanic champion towing 12 10000 meter long cables in area bound…
    Western South Atlantic · Brazil-south Coast
  46. HYDROLANT 1278/172017-04-22 → 2017-04-30
    Survey operations in progress until 29 apr by M/V oceanic champion towing 12 10000 meter long cables in area…
    Western South Atlantic · Brazil-south Coast
  47. HYDROLANT 1252/172017-04-19 → 2017-11-26
    Survey operations in progress until further notice by M/V hysy 721 in area bound by 02-30.19S 008-49.10E,…
    Eastern South Atlantic · Gabon
  48. HYDROLANT 1220/172017-04-16 → 2017-04-19
    Survey operations by M/V polarcus alima towing 12 8100 meter long cables: a. 16 and 17 apr along trackline…
    Western South Atlantic
  49. HYDROLANT 1214/172017-04-16 → 2017-04-22
    Survey operations 17 apr until further notice by M/V bgp pioneer towing seven mile long cable in area bound…
    Western South Atlantic
  50. HYDROLANT 1210/172017-04-15 → 2017-04-17
    Survey operations 15 and 16 apr by M/V polarcus alima towing 12 8100 meter long cables along tracklines…
    Western South Atlantic

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 29 · seahazards