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
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S
O
N
D

Other hazards in the South Atlantic Ocean

Archive · 2,275 cancelled

  1. HYDROLANT 3300/172017-10-16 → 2017-10-16
    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 3256/172017-10-12 → 2018-02-17
    Survey operations in progress until 16 feb 18 by M/V bgp challenger and M/V sea moby dick towing 80 150…
    Western South Atlantic Brazil-north Coast
  3. HYDROLANT 3254/172017-10-11 → 2017-12-29
    Underwater operations 1000Z to 2000Z daily until 29 dec by M/V pacific guardian in area bound by 03-30.00S…
    Western South Atlantic · Brazil-north Coast
  4. HYDROLANT 3239/172017-10-11 → 2017-10-11
    Underwater operations 1000Z to 2000Z daily until 19 dec by M/V pacific guardian in area bound by 03-30.00S…
    Western South Atlantic · Brazil-north Coast
  5. HYDROLANT 3202/172017-10-08 → 2017-10-11
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  6. HYDROLANT 3192/172017-10-07 → 2017-10-08
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  7. HYDROLANT 3178/172017-10-06 → 2017-10-07
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  8. HYDROLANT 3170/172017-10-05 → 2017-10-06
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  9. HYDROLANT 3146/172017-10-04 → 2017-10-05
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  10. HYDROLANT 3120/172017-10-02 → 2017-10-04
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  11. HYDROLANT 3113/172017-10-01 → 2017-10-02
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  12. HYDROLANT 3094/172017-09-28 → 2017-10-07
    Survey operations 29 sep thru 06 oct by M/V oceanic champion towing 12 9260 meter long cables in area bound…
    Western South Atlantic · Brazil-southeast Coast
  13. HYDROLANT 3079/172017-09-28 → 2017-10-01
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  14. HYDROLANT 3054/172017-09-27 → 2017-09-28
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  15. HYDROLANT 3036/172017-09-26 → 2017-09-27
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  16. HYDROLANT 3018/172017-09-25 → 2017-09-26
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  17. HYDROLANT 3004/172017-09-24 → 2017-09-25
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  18. HYDROLANT 2994/172017-09-23 → 2017-10-01
    Underwater operations in progress until 30 sep by M/V lorelay in area within 0.5 miles of 23-02.15S 042-39.80W
    Western South Atlantic · Brazil-south Coast
  19. HYDROLANT 2988/172017-09-23 → 2017-09-24
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  20. HYDROLANT 2841/172017-09-14 → 2017-09-14
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  21. HYDROLANT 2837/172017-09-13 → 2017-09-14
    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 2833/172017-09-13 → 2017-09-13
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  23. HYDROLANT 2823/172017-09-12 → 2017-09-13
    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 2815/172017-09-12 → 2017-09-12
    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 2812/172017-09-12 → 2017-10-21
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  26. HYDROLANT 2809/172017-09-12 → 2017-09-12
    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 2798/172017-09-11 → 2017-09-12
    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 2772/172017-09-08 → 2017-09-12
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  29. HYDROLANT 2735/172017-09-07 → 2017-09-08
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  30. HYDROLANT 2632/172017-08-28 → 2017-09-11
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  31. HYDROLANT 2607/172017-08-26 → 2017-08-31
    Underwater operations 1000Z to 2000Z daily 26 thru 31 aug by M/V river sub I in 03-34.78S 038-44.48W
    Western South Atlantic · Brazil-north Coast
  32. HYDROLANT 2535/172017-08-18 → 2017-08-27
    Survey operations 19 thru 26 aug by M/V oceanic champion towing 12 9260 meter long cables in area bound by…
    Western South Atlantic · Brazil-southeast Coast
  33. HYDROLANT 2523/172017-08-17 → 2017-10-12
    Survey operations in progress until further notice by M/V A.R.A
    Drake Passage · Argentina · Chile
  34. HYDROLANT 2501/172017-08-15 → 2017-09-07
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  35. HYDROLANT 2488/172017-08-14 → 2017-08-17
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic · Scotia Sea
  36. HYDROLANT 2474/172017-08-12 → 2017-08-20
    Survey operations in progress until 19 aug by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-southeast Coast
  37. HYDROLANT 2405/172017-08-04 → 2017-08-07
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  38. HYDROLANT 2380/172017-08-02 → 2017-08-13
    Survey operations in progress until 12 aug by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-east Coast
  39. HYDROLANT 2336/172017-07-29 → 2017-08-02
    Survey operations in progress until 02 aug by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-southeast Coast
  40. HYDROLANT 2290/172017-07-24 → 2017-08-15
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  41. HYDROLANT 2212/172017-07-17 → 2017-07-24
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  42. HYDROLANT 2193/172017-07-14 → 2017-07-23
    Survey operations in progress 15 thru 22 jul by M/V oceanic champion towing 12 9260 meter long cables in…
    Western South Atlantic · Brazil-southeast Coast
  43. HYDROLANT 2133/172017-07-10 → 2017-07-17
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-42.0S 016-07.0E
    Eastern South Atlantic · Namibia
  44. HYDROLANT 2117/172017-07-07 → 2017-07-16
    Survey operations in progress 08 thru 15 jul by M/V oceanic champion towing 12 9260 meter long cables in…
    Western South Atlantic · Brazil-southeast Coast
  45. HYDROLANT 2028/172017-07-01 → 2017-07-03
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  46. HYDROLANT 2027/172017-07-01 → 2017-07-09
    Survey operations in progress thru 08 jul by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil
  47. HYDROLANT 2026/172017-07-01 → 2017-07-11
    Underwater operations 1000Z to 2000Z 01 thru 11 jul by M/V oceanicasub V in: a. 02-57.42S 038-58.33W
    Western South Atlantic · Brazil-north Coast
  48. HYDROLANT 2010/172017-06-30 → 2017-07-01
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  49. HYDROLANT 1984/172017-06-28 → 2017-06-30
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  50. HYDROLANT 1973/172017-06-27 → 2017-06-28
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina

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 28 · seahazards