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 3507/162016-12-28 → 2017-01-16
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-43.2S 015-58.7E
    Eastern South Atlantic · Namibia
  2. HYDROLANT 3409/162016-12-17 → 2016-12-27
    Underwater operations 1000Z to 2000Z daily 17 thru 27 dec by M/V comando-b in: a. 20-18.40S 040-07.45W
    Western South Atlantic · Brazil-southeast Coast
  3. HYDROLANT 3402/162016-12-16 → 2016-12-17
    Underwater operations 1000Z to 2000Z daily 17 thru 27 dec by M/V comando-b in 20-18.40S 040-07.45W
    Western South Atlantic · Brazil-southeast Coast
  4. HYDROLANT 3278/162016-12-05 → 2016-12-28
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-44.2S 015-58.5E
    Eastern South Atlantic · Namibia
  5. HYDROLANT 3239/162016-12-02 → 2016-12-20
    Underwater operations 1000Z to 2000Z daily 02 thru 20 dec by M/V peace bright and M/V proboat in 20-50.85S…
    Western South Atlantic · Brazil-southeast Coast
  6. HYDROLANT 3150/162016-11-25 → 2017-02-25
    Underwater operations in progress until 242359Z feb 17 in 25-31.12S 043-27.98W
    Western South Atlantic
  7. HYDROLANT 3149/162016-11-25 → 2016-12-05
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-44.2S 015-58.5E
    Eastern South Atlantic · Namibia
  8. HYDROLANT 3144/162016-11-24 → 2016-11-25
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-42.2S 015-08.2E
    Eastern South Atlantic · Namibia
  9. HYDROLANT 3098/162016-11-20 → 2016-11-25
    Underwater operations 1000Z to 2000Z daily 21 thru 25 nov by M/V flamar and M/V ultra letizia in 20-23.9S…
    Western South Atlantic · Brazil-southeast Coast
  10. HYDROLANT 3083/162016-11-19 → 2016-11-29
    Underwater operations 1000Z to 2000Z daily 19 thru 29 nov by M/V comando-b and M/V ultra letizia in…
    Western South Atlantic · Brazil-southeast Coast
  11. HYDROLANT 3077/162016-11-18 → 2016-11-29
    Underwater operations 1000Z to 2000Z daily 19 thru 29 nov by M/V comando-b and M/V bridgegate in 20-22.83S…
    Western South Atlantic · Brazil-southeast Coast
  12. HYDROLANT 3074/162016-11-18 → 2016-11-28
    Underwater operations 1000Z to 2000Z daily 18 thru 28 nov by M/V commando-b and M/V acer arrow in 20-22.17S…
    Western South Atlantic · Brazil-southeast Coast
  13. HYDROLANT 3072/162016-11-18 → 2016-11-24
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-42.2S 015-08.2E
    Eastern South Atlantic · Namibia
  14. HYDROLANT 2976/162016-11-10 → 2017-04-01
    Scientific mooring, at depth 30 meters, established in 23-37.37S 041-34.79W
    Western South Atlantic · Brazil-southeast Coast
  15. HYDROLANT 2883/162016-11-02 → 2016-11-13
    Underwater operations 1000Z to 2000Z daily 03 thru 13 nov by M/V monty orr tide and M/V comando-b in…
    Western South Atlantic · Brazil-southeast Coast
  16. HYDROLANT 2881/162016-11-01 → 2016-11-11
    Underwater operations 1000Z to 2000Z daily 02 thru 11 nov in 20-22.5S 040-09.0W
    Western South Atlantic · Brazil-southeast Coast
  17. HYDROLANT 2874/162016-11-01 → 2016-11-08
    Underwater operations 1000Z to 2000Z daily 01 thru 08 nov by M/V minoan grace in 20-18.58S 040-10.17W
    Western South Atlantic · Brazil-southeast Coast
  18. HYDROPAC 3275/162016-10-26 → 2016-11-07
    Survey operations in progress until further notice by M/V geo resolution vicinity of trackline joining…
    Western South Pacific · Fiji
  19. HYDROLANT 2803/162016-10-25 → 2016-11-18
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-42.2S 016-08.3E
    Eastern South Atlantic · Namibia
  20. HYDROLANT 2780/162016-10-22 → 2017-01-01
    Scientific moorings established: a. a, in 44-42.59S 059-35.04W
    Western South Atlantic · Argentina
  21. HYDROLANT 2754/162016-10-20 → 2016-11-05
    Underwater operations 1100Z to 2000Z daily until 05 nov by M/V heina in 20-25.7S 040-11.3W
    Western South Atlantic · Brazil-southeast Coast
  22. HYDROLANT 2753/162016-10-20 → 2016-11-01
    Underwater operations 1100Z to 2000Z daily until 05 nov by M/V minoan grace in 20-24.79S 040-12.20W
    Western South Atlantic · Brazil-southeast Coast
  23. HYDROLANT 2752/162016-10-20 → 2016-11-05
    Underwater operations 1000Z to 2000Z daily until 05 nov by M/V anangel aspiration in 20-43.20S 040-02.55W
    Western South Atlantic · Brazil-southeast Coast
  24. HYDROLANT 2739/162016-10-18 → 2016-10-26
    Underwater operations 1100Z to 2100Z daily 18 thru 26 oct by M/V cohiba and M/V alta navegacao in 20-22.42S…
    Western South Atlantic · Brazil-southeast Coast
  25. HYDROLANT 2735/162016-10-18 → 2016-10-18
    Underwater operations 1100Z to 2100Z daily 18 thru 26 oct by M/V cohiba and M/V alta navegacao in 20-22.42S…
    Western South Atlantic · Brazil-southeast Coast
  26. HYDROLANT 2685/162016-10-14 → 2016-11-05
    Underwater operations 151100Z oct to 052100Z nov by M/V kamarin in 20-19.50S 040-09.83W
    Western South Atlantic · Brazil-southeast Coast
  27. HYDROLANT 2636/162016-10-09 → 2016-10-17
    Underwater operations 0800Z to 2100Z daily 10 thru 17 oct by M/V levitico and M/V patrick le blanc in…
    Brazil-north Coast
  28. HYDROLANT 2606/162016-10-06 → 2016-10-25
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-42.3S 016-08.3E
    Eastern South Atlantic · Namibia
  29. HYDROLANT 2587/162016-10-05 → 2016-11-01
    Survey operations in progress until 31 oct by M/V zn drakkar towing 100 meter long cable in area bound by…
    Brazil-southeast Coast
  30. HYDROLANT 2586/162016-10-05 → 2016-10-30
    Underwater operations 1100Z to 2100Z daily 05 thru 30 oct by M/V wyatt candies in 19-31.87S 039-15.45W
    Brazil-east Coast
  31. HYDROLANT 2505/162016-09-26 → 2016-10-06
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-38.2S 015-50.0E
    Eastern South Atlantic · Namibia
  32. HYDROLANT 2479/162016-09-23 → 2016-10-02
    Underwater operations 1100Z to 2100Z daily 24 sep thru 02 oct by M/V kastelli wave in 20-18.05S 040-09.75W
    Brazil-southeast Coast
  33. HYDROLANT 2388/162016-09-14 → 2016-09-26
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-38.2S 015-50.0E
    Eastern South Atlantic · Namibia
  34. HYDROLANT 2381/162016-09-14 → 2016-09-25
    Underwater operations 0800Z to 1800Z daily 15 thru 25 sep by M/V lancha zila II and M/V bravamar II in…
    Brazil-southeast Coast
  35. HYDROLANT 2328/162016-09-08 → 2016-09-14
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-42.2S 016-08.0E
    Eastern South Atlantic · Namibia
  36. HYDROLANT 2203/162016-08-27 → 2016-09-08
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-33.2S 015-50.4E
    Eastern South Atlantic · Namibia
  37. HYDROLANT 2176/162016-08-25 → 2016-09-05
    Underwater operations 1100Z to 2100Z daily 25 aug thru 05 sep by M/V milagro and M/V zilah II in 20-17.67S…
    Brazil-southeast Coast
  38. HYDROLANT 2175/162016-08-25 → 2016-09-05
    Underwater operations 1100Z to 2100Z daily 25 aug thru 05 sep by M/V rr australia and M/V bravamar II in…
    Brazil-southeast Coast
  39. HYDROLANT 2107/162016-08-18 → 2016-09-10
    Underwater operations in progress until 092359Z sep by M/V saga badejo along trackline between 24-02.32S…
    Brazil-south Coast
  40. HYDROLANT 2091/162016-08-17 → 2016-08-31
    Underwater operations 1100Z to 2100Z daily 17 thru 31 aug by M/V wyatt candies in 19-31.87S 039-15.45W
    Brazil-east Coast
  41. HYDROLANT 2056/162016-08-13 → 2016-08-19
    Underwater operations 0900Z to 2100Z daily 14 thru 19 aug by M/V proboat, M/V sion and M/V aquitania g in…
    Brazil-southeast Coast
  42. HYDROLANT 2055/162016-08-13 → 2016-08-19
    Underwater operations 1100Z to 2100Z daily 14 thru 19 aug by M/V proboat, M/V sion and M/V alcor mar in…
    Brazil-southeast Coast
  43. HYDROLANT 2053/162016-08-13 → 2016-08-18
    Underwater operations 1300Z to 2100Z daily 13 thru 18 aug by M/V tianjin pionner, M/V proboat and M/V sion…
    Brazil-southeast Coast
  44. HYDROLANT 1991/162016-08-06 → 2016-08-18
    Underwater operations 1100Z to 2100Z daily 08 thru 18 aug by M/V cmb mistral, M/V zilah II and M/V bravamar…
    Brazil-southeast Coast
  45. HYDROLANT 1990/162016-08-06 → 2016-08-10
    Hydrographic survey in progress until further notice by M/V ridley thomas along trackline between 01-24.3S…
    Eastern Atlantic · Gulf of Guinea · Sao Tome and Principe
  46. HYDROLANT 1846/162016-07-21 → 2016-08-27
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-27.2S 015-51.2E
    Eastern South Atlantic · Namibia
  47. HYDROLANT 1804/162016-07-17 → 2016-07-27
    Underwater operations 1100Z to 2100Z daily until 27 jul in 20-22.1S 040-10.0W
    Brazil-southeast Coast
  48. HYDROLANT 1784/162016-07-15 → 2016-07-24
    Hydrographic survey 16 thru 23 jul by M/V ocean endeavour in area bound by 23-59.87S 041-19.42W, 20-16.51S…
    Brazil-east Coast
  49. HYDROLANT 1728/162016-07-09 → 2016-07-17
    Survey operations in progress until 16 jul by M/V ocean endeavuor in area bound by 23-30S 043-00W, 24-42S…
    Brazil-southeast Coast
  50. HYDROLANT 1705/162016-07-06 → 2016-07-21
    Underwater operations in progress until further notice by: a. M/V coral sea in 28-27.2S 015-51.2E
    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 32 · seahazards