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 45/152015-01-06 → 2015-01-15
    Underwater operations in progress until further notice by: a. M/V gariep in 28-41.0S 016-10.6E
    Eastern South Atlantic · Namibia
  2. HYDROLANT 5/152015-01-02 → 2015-01-06
    Underwater operations in progress until further notice by: a. M/V gariep in 28-35.3S 015-55.8E
    Eastern South Atlantic · Namibia
  3. HYDROLANT 3164/142014-12-29 → 2015-01-02
    Underwater operations in progress until further notice by: a. M/V gariep in 28-35.3S 015-55.8E
    Eastern South Atlantic · Namibia
  4. HYDROLANT 3092/142014-12-19 → 2014-12-29
    Underwater operations in progress until further notice by: a. M/V gariep in 28-35.3S 015-55.8E
    Eastern South Atlantic · Namibia
  5. HYDROLANT 3054/142014-12-15 → 2015-03-13
    Survey operations in progress until further notice by M/V western trident towing 2600 meter long cable in…
    Eastern South Atlantic · Angola
  6. HYDROLANT 2949/142014-12-03 → 2015-07-30
    Underwater operations in progress until further notice by M/V saipem in area bound by 06-28.41S 011-09.28E,…
    Eastern South Atlantic · Angola
  7. HYDROLANT 2777/142014-11-17 → 2015-05-18
    Hydrographic survey 170900Z nov to 180155Z may 15 by M/V celia in area bound by 25-50S 045-00W, 25-50S…
    Brazil-southeast Coast
  8. HYDROLANT 2771/142014-11-16 → 2014-11-17
    Oceanographic operations in progress until further notice by M/V puerto deseado in: a. 54-41.3S 060-35.7W
    Western South Atlantic · Scotia Sea
  9. HYDROLANT 2746/142014-11-14 → 2014-11-27
    Survey operations in progress until further notice by M/V ramform vanguard towing 12 8000 meter long cables…
    Eastern South Atlantic · Namibia
  10. HYDROLANT 2540/142014-10-18 → 2014-10-30
    Underwater operations 1100Z to 2100Z daily 19 thru 30 oct in 20-19S 040-08W
    Brazil-southeast Coast
  11. HYDROLANT 2500/142014-10-14 → 2014-10-15
    Oceanographic operations in progress until further notice by M/V puerto deseado in: a. 34-10.00S 051-50.00W
    Brazil-south Coast
  12. HYDROLANT 2489/142014-10-13 → 2014-10-14
    Oceanographic operations in progress until further notice by M/V ara puerto deseado in 34-30S 051-30W
    Brazil-south Coast
  13. HYDROLANT 2484/142014-10-12 → 2014-10-13
    Oceanographic operations in progress until further notice by M/V ara puerto deseado along trackline between…
    Western South Atlantic
  14. HYDROLANT 2464/142014-10-10 → 2014-10-12
    Oceanographic operations in progress until further notice by M/V ara puerto deseado along trackline between…
    Western South Atlantic
  15. HYDROLANT 2458/142014-10-09 → 2014-10-10
    Oceanographic operations in progress until further notice by M/V ara puerto deseado along trackline between…
    Western South Atlantic
  16. HYDROLANT 2451/142014-10-09 → 2014-11-14
    Survey operations in progress until further notice by M/V ramform vanguard towing 12 8000 meter long cables…
    Eastern South Atlantic · Namibia
  17. HYDROLANT 2442/142014-10-08 → 2014-10-09
    Oceanographic operations in progress until further notice by M/V ara puerto deseado in: a. 38-00S 057-33W
    Western South Atlantic
  18. HYDROLANT 2431/142014-10-07 → 2014-10-08
    Oceanographic operations in progress until further notice by M/V ara puerto deseado in 36-18.05S 051-59.08W
    Western South Atlantic
  19. HYDROLANT 2427/142014-10-07 → 2015-03-23
    Underwater operations in progress until further notice by M/V explorer in: a. 28-14.16S 015-59.39E
    Eastern South Atlantic · Namibia
  20. HYDROLANT 2411/142014-10-06 → 2014-12-19
    Underwater operations in progress until further notice by: a. M/V gariep in 28-35.3S 015-55.8E
    Eastern South Atlantic · Namibia
  21. HYDROLANT 2398/142014-10-04 → 2014-10-07
    Oceanographic operations in progress until further notice by M/V puerto deseado in: a. 38-00S 057-33W
    Western South Atlantic
  22. HYDROLANT 2288/142014-09-23 → 2014-10-31
    Underwater operations in progress until 302359Z oct by M/V dsv armada condor with submersible within five…
    Eastern South Atlantic · Gabon
  23. HYDROLANT 2263/142014-09-18 → 2014-10-06
    Underwater operations in progress until further notice by: a. M/V gariep in 28-27.0S 015-52.4E
    Eastern South Atlantic · Namibia
  24. HYDROLANT 2011/142014-08-22 → 2014-09-18
    Underwater operations in progress until further notice by: a. M/V gariep in 28-27.0S 015-52.4E
    Eastern South Atlantic · Namibia
  25. HYDROLANT 2000/142014-08-21 → 2014-12-20
    Underwater operations in progress until 150359Z feb 15 in area bound by 11-15.51S 036-59.70W, 11-14.58S…
    Brazil-east Coast
  26. HYDROLANT 1929/142014-08-12 → 2014-09-10
    Hydrographic survey in progress until 09 sep by M/V garnier sampaio in area bound by 00-32.7N 045-55.0W,…
    Western South Atlantic · Brazil-north Coast
  27. HYDROLANT 1921/142014-08-12 → 2014-08-12
    Survey operations in progress until 09 sep by M/V garnier sampaio in area bound by 00-32.7N 045-55.0W,…
    Brazil-north Coast
  28. HYDROLANT 1856/142014-08-01 → 2014-08-07
    Survey operations in progress until 070259Z aug by vessel towing 12 five mile long cables in area bound by…
    Brazil-southeast Coast
  29. HYDROLANT 1846/142014-07-30 → 2015-08-03
    Underwater operations in progress until further notice by M/V seasafe salvo in 06-03.82S 012-11.57E
    Eastern South Atlantic · Angola
  30. HYDROLANT 1845/142014-07-30 → 2014-08-22
    Underwater operations in progress until further notice by: a. M/V gariep in 28-27.0S 015-52.4E
    Eastern South Atlantic · Namibia
  31. HYDROLANT 1737/142014-07-17 → 2014-07-30
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-40.0S 015-57.2E
    Eastern South Atlantic · Namibia
  32. HYDROLANT 1716/142014-07-15 → 2014-09-16
    Underwater operations in progress until 15 sep by M/V bsm I, M/V arara III, M/V mar azul, M/V asteomar V and…
    Brazil-northeast Coast
  33. HYDROLANT 1569/142014-06-26 → 2014-07-17
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-28.4S 015-53.3E
    Eastern South Atlantic · Namibia
  34. HYDROLANT 1544/142014-06-24 → 2014-06-26
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-28.4S 015-53.3E
    Eastern South Atlantic · Namibia
  35. HYDROLANT 1529/142014-06-22 → 2014-06-24
    Underwater operations in progress until further notice by: a. M/V gariep in 28-35.6S 015-51.4E
    Eastern South Atlantic · Namibia
  36. HYDROLANT 1320/142014-05-26 → 2014-06-14
    Geological survey in progress until further notice by M/V fugro brasilis in area bound by 36-00S 052-30W,…
    Western South Atlantic · Uruguay
  37. HYDROLANT 1317/142014-05-26 → 2014-06-22
    Underwater operations in progress until further notice by: a. M/V gariep in 28-35.5S 015-51.1E
    Eastern South Atlantic · Namibia
  38. HYDROLANT 1261/142014-05-18 → 2014-05-26
    Underwater operations 1100Z to 2000Z daily until 26 may by M/V mar azul I in 20-18S 040-08W
    Brazil-southeast Coast
  39. HYDROLANT 1227/142014-05-14 → 2014-05-26
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-27.0S 015-53.0E
    Eastern South Atlantic · Namibia
  40. HYDROLANT 1183/142014-05-10 → 2014-05-14
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-27.0S 015-53.0E
    Eastern South Atlantic · Namibia
  41. HYDROLANT 1125/142014-05-02 → 2014-05-10
    Underwater operations in progress until further notice by M/V coral sea in 28-37.1S 015-54.0E
    Eastern South Atlantic · Namibia
  42. HYDROLANT 1081/142014-04-24 → 2014-05-02
    Underwater operations in progress until further notice by M/V coral sea in 28-36.6S 015-53.9E
    Eastern South Atlantic · Namibia
  43. HYDROLANT 1061/142014-04-21 → 2014-04-24
    Underwater operations in progress until further notice by M/V coral sea in 28-26.6S 015-50.8E
    Eastern South Atlantic · Namibia
  44. HYDROLANT 1013/142014-04-14 → 2014-04-21
    Underwater operations in progress until further notice by M/V coral sea in 28-39.1S 016-03.4E
    Eastern South Atlantic · Namibia
  45. HYDROLANT 969/142014-04-09 → 2014-04-14
    Underwater operations in progress until further notice by M/V coral sea in 28-49.2S 016-05.1E
    Eastern South Atlantic · Namibia
  46. HYDROLANT 961/142014-04-09 → 2014-07-15
    Underwater operations in progress until 15 jul by M/V bsm I, M/V arara III, M/V mar azul, M/V asteomar V and…
    Brazil-northeast Coast
  47. HYDROLANT 923/142014-04-04 → 2014-04-05
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 54-55.6S 067-07.1W
    Argentina-south Coast · Chile-south Coast
  48. HYDROLANT 904/142014-04-03 → 2014-04-04
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 54-31.6S 064-53.7W
    Western South Atlantic · Argentina-southeast Coast
  49. HYDROLANT 893/142014-04-02 → 2014-04-03
    Oceanographic operations in progress until further notice by M/V puerto deseado vicinity 53-27.0S 067-41.5W
    Western South Atlantic · Argentina-southeast Coast
  50. HYDROLANT 889/142014-04-01 → 2014-04-09
    Underwater operations in progress until further notice by M/V coral sea in 28-39.0S 015-49.8E
    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 35 · seahazards