Survey operations in 2026

Hydrographic and scientific survey vessels, often towing long arrays.

issued in 2026
95
still in force
73
vs 2025
+1257%
first · last
01-27 · 08-20

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 this year is under-counted.

By month

J
F
M
A
M
J
J
A
S
O
N
D

By NAVAREA series

  • HYDROLANT34
  • HYDROPAC20
  • NAVAREA IV18
  • AUSCOAST12
  • NAVAREA III8
  • HYDROARC2
  • NAVAREA X1

Where · top seas

South Atlantic Ocean2935%
North Atlantic Ocean1417%
Indian Ocean1215%
Black Sea810%
Timor Sea45%
Coral Sea45%
North Sea34%
Sea of Okhotsk34%
Persian Gulf34%
Caribbean Sea22%

All survey operations issued in 2026 · 95

  1. AUSCOAST 280/26in force2026-08-20
    Drill rig Valaris 107 is at position 38 degrees 17.79 minutes south, 147 degrees 40.57 minutes east, requesting 2.5 nautical miles clearance.
  2. HYDROLANT 1625/262026-08-20 → 2026-08-20
    Underwater operations 0800Z to 1800Z daily 21 aug thru 04 sep by M/V capetan vassilis II and M/V comando b…
    South Atlantic · Brazil
  3. HYDROLANT 1621/262026-08-20 → 2026-08-20
    Underwater operations 1000Z to 2000Z daily until 25 aug by vessel nomar in 24-07.27S 046-09.30W
    South Atlantic · Brazil
  4. HYDROLANT 1620/262026-08-19 → 2026-08-20
    Survey operations in progress until 24 aug by M/V sea 1 dorado in area bound by 24-53.20S 042-47.12W,…
    South Atlantic
  5. HYDROLANT 1619/262026-08-19 → 2026-08-20
    Underwater operations in progress until 280259Z aug by M/V siem pilot in 24-35.02S 042-15.37W
    South Atlantic
  6. HYDROLANT 1616/262026-08-19 → 2026-08-19
    Underwater operations daily 20 Aug through 03 Sep by vessels Charlie and Comando B in 20-24.27S 040-09.57W, wide berth requested.
    South Atlantic · Brazil
  7. HYDROLANT 1615/262026-08-19 → 2026-08-19
    Underwater operations daily from 20 August to 3 September, 1100 to 2100 UTC, by vessels Comando B and Linden Trader at 20-22.98S 040-08.73W. Wide berth requested.
    South Atlantic · Brazil
  8. HYDROLANT 1614/262026-08-19 → 2026-08-19
    Underwater operations by vessels Hui An and Comando B are ongoing daily from 20 August to 3 September in South Atlantic, Brazil, at 20-23.17S 040-10.02W, wide berth requested.
    South Atlantic · Brazil
  9. HYDROPAC 2373/262026-08-19 → 2026-08-19
    Survey operations by vessel Fugro Kwilena are underway in the eastern Indian Ocean off Australia; a two-mile berth is requested, cancelling warning 2157/26.
    Eastern Indian Ocean · Australia
  10. AUSCOAST 279/26in force2026-08-19
    Special purpose vessel Fugro Kwilena is conducting underwater operations in area from 19-47.68S 115-12.91E to 19-57.87S 115-25.37E, requesting 1.5 nautical mile clearance.
  11. NAVAREA IV 799/262026-08-18 → 2026-08-19
    Underwater operations by vessel Atlantis are underway near 37-32.00N 074-14.00W in Delaware from August 30 to September 18, wide berth requested.
    North Atlantic · Delaware
  12. HYDROLANT 1600/262026-08-18 → 2026-08-19
    Underwater operations are conducted daily from 0800 UTC to 1800 UTC until 28 August by vessels Spar Aries and Comando B at 20-48.85S 040-27.23W; wide berth requested.
    South Atlantic · Brazil
  13. HYDROLANT 1599/262026-08-18 → 2026-08-19
    Underwater operations by vessels Comando B and AM Kirti occur daily 0800Z to 1800Z until 29 August at 20-19.03S 040-08.77W; wide berth requested.
    South Atlantic · Brazil
  14. HYDROLANT 1592/262026-08-17 → 2026-08-19
    Underwater operations by vessels Spar Aries and Comando B occur daily from 1100Z to 2100Z, 18-28 August, at 20-48.85S 040-27.23W, wide berth requested.
    South Atlantic · Brazil
  15. AUSCOAST 277/26in force2026-08-17
    Drill rig Transocean Equinox is located at 38-46.20S 142-48.80E, with 2.5 nautical miles clearance requested.
  16. NAVAREA III 123/26in force2026-08-17
    Drilling operations by KANUNI platform in Black Sea from 18 Aug 26 to 07 Oct 26, 10 nautical mile wide berth requested.
    Black Sea
  17. NAVAREA III 122/26in force2026-08-17
    Drilling operations by Abdulhamid Han rig with support vessels in Black Sea from 19 Aug to 27 Nov 26, requesting 10 nautical mile clearance.
    Black Sea
  18. AUSCOAST 275/26in force2026-08-16
    Drill rig Transocean Endurance is at position 19-31.18S 116-06.65E, requesting 2.5 nautical miles clearance.
  19. HYDROLANT 1583/262026-08-15 → 2026-08-19
    Survey operations by M/V Amazon Conqueror towing eight one-mile-long cables in North Sea off Norway until further notice. Two-mile berth requested.
    North Sea · Norway
  20. HYDROLANT 1582/262026-08-15 → 2026-08-19
    Underwater operations are conducted daily from 0800 to 1800, 16-30 August, by ships White Defender and Comando B near 20-26.83S 040-08.73W; wide berth requested.
    South Atlantic · Brazil
  21. HYDROLANT 1578/262026-08-15 → 2026-08-19
    Vessels Moonbeam and Comando B are conducting underwater operations near 20-21.82S 040-08.98W, Brazil, from August 15 08:00 UTC to August 29 18:00 UTC; a wide berth is requested.
    South Atlantic · Brazil
  22. NAVAREA IV 791/262026-08-14 → 2026-08-19
    Survey operations by vessel Ocean Intervention II continue in the North Atlantic near Trinidad and Tobago until August 25, with a 500-meter berth requested.
    North Atlantic
  23. 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
  24. 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
  25. 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
  26. 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
  27. NAVAREA IV 783/26in force2026-08-12
    NAVAREA IV lists positions of mobile offshore drilling units as of August 12 at 14:40 UTC.
  28. NAVAREA III 121/26in force2026-08-11
    In the Black Sea, drilling operations by the Yildirim rig occur from 11 August 2026 to 25 September 2026; a 10 nautical mile berth is requested.
    Black Sea
  29. 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
  30. HYDROPAC 2288/26in force2026-08-10
    Underwater operations are in progress by vessel VE Constructor in an area off Australia, bounded by 19-12S to 19-21S and 116-30E to 116-50E, requesting one mile berth.
    Indian Ocean · Australia
  31. AUSCOAST 270/26in force2026-08-10
    Special purpose vessel VE Constructor conducting underwater operations in area bounded by 19-12S to 19-21S and 116-30E to 116-50E, 0.5 nautical miles clearance requested.
  32. 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
  33. 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
  34. HYDROPAC 2280/26in force2026-08-09
    Survey operations by vessel Vision 2 in Persian Gulf, Kuwait, from 10 August until further notice. Wide berth requested.
    Persian Gulf · Kuwait
  35. 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
  36. 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
  37. NAVAREA IV 762/26in force2026-08-06
    Survey operations are in progress until 31 December by vessel Island Frontier in the Gulf of America off Louisiana; wide berth requested.
    Gulf of America · Louisiana
  38. HYDROPAC 2249/26in force2026-08-06
    Survey operations by vessel PXGEO 2 towing eight 5-mile cables continue until 31 December in Gulf of Thailand and South China Sea; wide berth requested.
    Gulf of Thailand · South China Sea · Malaysia
  39. 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
  40. AUSCOAST 267/26in force2026-08-05
    Drill rig JANSZ is at position 19-52.73S 114-36.50E, requesting a 2.5 nautical mile clearance.
  41. HYDROPAC 2241/26in force2026-08-05
    Survey operations in progress in Timor Sea off Australia by vessel SW BLY towing twelve 7300-meter cables, seven-mile berth requested.
    Timor Sea · Australia
  42. HYDROPAC 2232/26in force2026-08-04
    Survey operations by vessel Furgo Proteus are underway in Persian Gulf near Qatar until 05 Sep, with a two-mile berth requested.
    Persian Gulf · Qatar
  43. HYDROLANT 1496/26in force2026-08-03
    Survey operations are underway in the North Sea near Norway by the vessel Ramform Hyperion towing ten 2740-meter cables, requesting a three-mile berth.
    North Sea · Norway
  44. HYDROLANT 1493/26in force2026-08-03
    Survey operations are in progress in the Black Sea off Romania by motor vessel Ocean Aero until August 16; a wide berth is requested in the survey area.
    Black Sea · Romania
  45. HYDROPAC 2203/26in force2026-08-01
    Underwater operations by the vessel Bhagwan Dryden at 20-06.96S 116-26.11E in the Eastern Indian Ocean, Australia, request a three-mile berth.
    Eastern Indian Ocean · Australia
  46. AUSCOAST 260/26in force2026-08-01
    Special purpose vessel Bhagwan Dryden is conducting underwater operations at position 20-06.96S 116-26.11E, requesting 2.5 nautical miles clearance.
  47. 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
  48. NAVAREA IV 743/26in force2026-07-31
    Underwater operations by vessels Atlantis and Alvin near Cayman Islands from August 2 to August 18, within 100 miles of 18°23'N 081°47'W, wide berth requested.
    Caribbean Sea · Cayman Islands
  49. HYDROLANT 1477/262026-07-31 → 2026-08-15
    Survey operations are in progress in the North Sea off Norway, with vessel Amazon Conqueror towing eight 1609-meter cables; two-mile berth requested.
    North Sea · Norway
  50. HYDROARC 152/26in force2026-07-30
    Survey operations are underway in the Kara Sea, Russia, until September 30, wide berth requested.
    Kara Sea · Russia

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 2026 · seahazards