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 4121/172017-12-19 → 2018-01-30
    Survey operations in progress until further notice by M/V ramform hyperion towing 9000 meter long cable in…
    Eastern South Atlantic · Namibia
  2. HYDROLANT 4076/172017-12-16 → 2017-12-24
    Survey operations in progress until 23 dec by M/V oceanic champion towing 12 9260 meter long cables in area…
    Western South Atlantic · Brazil-southeast Coast
  3. HYDROLANT 4074/172017-12-15 → 2017-12-24
    Western south atlantic DNC 01
  4. HYDROLANT 4033/172017-12-14 → 2017-12-24
    Survey operations in progress until 23 dec by M/V osprey explorer towing three 250 meter long cables in area…
    Western South Atlantic
  5. HYDROLANT 4032/172017-12-14 → 2017-12-23
    Survey operations in progress until 22 dec by M/V hugin explorer in area bound by 25-28.93S 042-49.79W,…
    Western South Atlantic
  6. HYDROLANT 3974/172017-12-09 → 2017-12-14
    Survey operations in progress until 15 dec by M/V hugin explorer in area bound by 25-28.93S 042-49.79W,…
    Western South Atlantic
  7. HYDROLANT 3961/172017-12-08 → 2018-02-02
    Survey operations in progress until further notice by M/V ramform sterling towing 6000 meter long cable in…
    Eastern South Atlantic · Angola
  8. HYDROLANT 3929/172017-12-05 → 2017-12-14
    Survey operations 06 thru 15 dec by M/V osprey explorer towing three 250 meter long cables in area bound by…
    Western South Atlantic
  9. HYDROLANT 3903/172017-12-04 → 2017-12-08
    Survey operations in progress until further notice by M/V ramform sterling towing 6000 meter long cable in…
    Eastern South Atlantic · Angola
  10. HYDROLANT 3852/172017-11-29 → 2017-12-07
    Survey operations in progress until 06 dec by M/V osprey explorer towing three 250 meter long cables in area…
    Western South Atlantic
  11. HYDROLANT 3851/172017-11-29 → 2017-12-07
    Survey operations in progress until 06 dec by M/V hugin explorer in area bound by 25-28.93S 042-49.79W,…
    Western South Atlantic
  12. HYDROLANT 3783/172017-11-23 → 2017-11-29
    Survey operations in progress until 28 nov by M/V hugin explorer in area bound by 25-28.93S 042-49.79W,…
    Western South Atlantic
  13. HYDROLANT 3782/172017-11-23 → 2017-11-29
    Survey operations in progress until 28 nov by M/V osprey explorer towing three 250 meter long cables in area…
    Western South Atlantic
  14. HYDROLANT 3763/172017-11-22 → 2017-11-30
    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 3698/172017-11-16 → 2017-11-23
    Survey operations in progress until 22 nov by M/V hugin explorer in area bound by 25-28.93S 042-49.79W,…
    Western South Atlantic
  16. HYDROLANT 3680/172017-11-15 → 2018-01-20
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  17. HYDROLANT 3670/172017-11-14 → 2017-11-15
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  18. HYDROLANT 3647/172017-11-11 → 2017-11-13
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  19. HYDROLANT 3641/172017-11-11 → 2017-11-13
    Underwater operations 0800Z to 2200Z daily 11 thru 13 nov by M/V lorelay in area within 0.5 miles of…
    Western South Atlantic · Brazil-south Coast.
  20. HYDROLANT 3627/172017-11-10 → 2017-11-11
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  21. HYDROLANT 3581/172017-11-05 → 2017-11-08
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  22. HYDROLANT 3559/172017-11-03 → 2017-11-05
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  23. HYDROLANT 3555/172017-11-03 → 2017-11-03
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  24. HYDROLANT 3545/172017-11-02 → 2017-11-03
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  25. HYDROLANT 3536/172017-11-01 → 2018-02-07
    Survey operations in progress until 20 feb 18 by M/V ramform tethys and M/V thor modi towing 16 8100 meter…
    Western South Atlantic · Brazil-north Coast
  26. HYDROLANT 3521/172017-10-30 → 2017-11-14
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  27. HYDROLANT 3517/172017-10-30 → 2017-10-31
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  28. HYDROLANT 3511/172017-10-30 → 2017-11-02
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  29. HYDROLANT 3499/172017-10-29 → 2017-10-30
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  30. HYDROLANT 3493/172017-10-28 → 2017-10-29
    Survey operations in progress until further notice by M/V A.R.A
    Western South Atlantic
  31. HYDROLANT 3448/172017-10-25 → 2017-11-18
    Survey operations 27 oct thru 17 nov along trackline between 07-07.0S 010-50.0E and 06-56.2S 010-55.2E
    Eastern South Atlantic
  32. HYDROLANT 3444/172017-10-25 → 2017-10-30
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  33. HYDROLANT 3409/172017-10-22 → 2017-10-23
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  34. HYDROLANT 3405/172017-10-22 → 2017-10-22
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  35. HYDROLANT 3396/172017-10-21 → 2017-10-30
    Underwater operations in progress until further notice by: a. M/V mafuta in 28-33.0S 015-55.0E
    Eastern South Atlantic · Namibia
  36. HYDROLANT 3395/172017-10-21 → 2017-10-22
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  37. HYDROLANT 3388/172017-10-21 → 2017-10-21
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  38. HYDROLANT 3387/172017-10-21 → 2017-10-21
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  39. HYDROLANT 3382/172017-10-20 → 2017-10-21
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  40. HYDROLANT 3373/172017-10-20 → 2017-10-20
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  41. HYDROLANT 3370/172017-10-20 → 2017-10-20
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  42. HYDROLANT 3369/172017-10-20 → 2017-10-31
    Underwater operations 0800Z to 2300Z daily 20 thru 30 oct by M/V lorelay in area within 0.5 miles of…
    Western South Atlantic · Brazil-south Coast
  43. HYDROLANT 3356/172017-10-19 → 2017-10-20
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  44. HYDROLANT 3352/172017-10-19 → 2017-10-19
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  45. HYDROLANT 3340/172017-10-18 → 2017-10-19
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic
  46. HYDROLANT 3333/172017-10-18 → 2017-10-18
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  47. HYDROLANT 3320/172017-10-17 → 2017-10-18
    Survey operations in progress until further notice by M/V bgp pioneer towing seven mile long cable in area…
    Western South Atlantic · Argentina
  48. HYDROLANT 3319/172017-10-17 → 2017-10-17
    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 3306/172017-10-16 → 2017-10-17
    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 3301/172017-10-16 → 2017-12-31
    Underwater operations in progress until 30 dec by M/V sistac vida in 23-54.00S 043-08.67W
    Western South Atlantic · Brazil-south Coast

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 27 · seahazards