Survey operations in the North Sea

Hydrographic and scientific survey vessels, often towing long arrays.

in force
1
last 12 months
3
vs previous 12 (0)
—
since 1997
583

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 · 1

  1. 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

Longest in force

  1. HYDROLANT 1496/26in force2026-08-03 · 19 d
    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

By year

97
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
26

By month (all years)

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

Other hazards in the North Sea

Archive · 582 cancelled

  1. HYDROLANT 82/102010-01-14 → 2010-01-27
    Underwater operations in progress until further notice by M/V edda fjord vicinity of trackline joining…
    England-southeast Coast
  2. HYDROLANT 1888/092009-09-30 → 2009-10-05
    Salvage operations in progress until further notice within 500 meters of 52-21.0N 001-43.5E
  3. HYDROLANT 1854/092009-09-25 → 2009-09-30
    Salvage operations in progress until further notice within 500 meters of 52-17.6N 001-45.2E
  4. HYDROLANT 1777/092009-09-18 → 2009-09-18
    Salvage operations in progress until further notice by M/V vos shelter vicinity 54-35.2N 001-25.4E
  5. HYDROLANT 1713/092009-09-09 → 2009-09-13
    Salvage operations in progress until further notice by M/V vos shelter vicinity 54-35.2N 001-25.4E
  6. HYDROLANT 1531/092009-08-13 → 2009-09-25
    Survey operations in progress until further notice by M/V search in area bound by 53-10.15N 002-34.10E,…
  7. HYDROLANT 1242/092009-07-04 → 2009-07-08
    Survey operations in progress until 072359Z jul by M/V pegase and M/V sagittaire within ten miles of…
  8. HYDROLANT 1096/092009-06-14 → 2009-07-13
    Underwater operations in progress until further notice by barge excalibur in area bound by 53-24N 000-59E,…
  9. HYDROLANT 997/092009-05-31 → 2009-06-09
    Underwater operations in progress until further notice by M/V investigator in area bound by 53-15.74N…
  10. HYDROLANT 977/092009-05-28 → 2009-06-26
    Hydrographic survey operations in progress until further notice by M/V thetis within 12 miles of 54-18N…
  11. HYDROLANT 649/092009-04-04 → 2009-04-05
    Salvage operations in progress until further notice within 1000 meters of 57-40.5N 001-24.5W
  12. HYDROLANT 1701/082008-10-13 → 2008-11-07
    Survey operations in progress until further notice by M/V geco eagle towing six 4000 meter long cables in…
  13. HYDROLANT 1594/082008-09-28 → 2008-11-09
    Survey operations in progress until further notice by M/V cefas endeavour in area bound by 52-50N 001-40E,…
  14. HYDROLANT 1416/082008-09-03 → 2008-10-08
    Survey operations in progress until further notice by M/V geco eagle towing six 5000 meter long cables in…
  15. HYDROLANT 1388/082008-08-29 → 2008-10-08
    Underwater operations in progress until further notice in vicinity of trackline between 53-21.1N 001-18.2E…
  16. HYDROLANT 990/082008-06-15 → 2008-07-01
    Survey operations in progress until further notice by M/V aurelia in area bound by 53-21.9N 000-58.4E,…
  17. HYDROLANT 954/082008-06-09 → 2008-06-24
    Survey operations in progress until further notice by M/V fs laperouse towing equipment in area bound by…
  18. HYDROLANT 408/082008-03-08 → 2008-04-11
    Underwater operations in progress until further notice by M/V acergy osprey along trackline between 53-02.4N…
  19. HYDROLANT 2176/072007-12-31 → 2008-01-02
    Underwater operations in progress until further notice by drill barge pontra maris vicinity 51-25.2N 001-38.9E
  20. HYDROLANT 2035/072007-12-08 → 2007-12-12
    Underwater operation in progress until further notice by M/V bucentaur in 53-03.0N 001-52.3E
  21. HYDROLANT 1559/072007-09-08 → 2007-09-24
    Underwater operations in progress until further notice by M/V polar bjorn between 53-00.28N 002-53.73E and…
  22. HYDROLANT 1488/072007-08-27 → 2007-08-29
    Underwater operations in progress until further notice in vicinity of 58-17.6N 000-26.0E
  23. HYDROLANT 1323/072007-07-28 → 2007-08-25
    Survey operations in progress by M/V sea surveyor vicinity 53-25.75N 002-53.85E
  24. HYDROLANT 1216/072007-07-10 → 2007-07-23
    Underwater operations in progress until further notice by M/V acergy falcon along trackline between 58-02.2N…
  25. HYDROLANT 555/072007-04-06 → 2007-04-10
    Underwater operations in progress until further notice by M/V vos sympathy with divers in 53-05.13N 001-51.04E
  26. HYDROLANT 2257/062006-12-16 → 2006-12-29
    Underwater operations in progress until further notice by M/V vos sympathy vicinity 52-59N 002-58E
  27. HYDROLANT 2228/062006-12-12 → 2007-02-08
    Underwater operations in progress until further notice by M/V resolution along trackline between 51-34.6N…
  28. HYDROLANT 2202/062006-12-09 → 2006-12-10
    Underwater operations in progress until further notice by M/V vos sympathy vicinity 52-58.9N 002-58.4E
  29. HYDROLANT 2093/062006-11-19 → 2006-11-20
    Survey operations in progress until further notice by M/V multraship commander towing 100 meter long cable…
  30. HYDROLANT 1876/062006-10-13 → 2006-10-16
    Underwater operations in progress until further notice by M/V vos sympathy vicinity 52-58.9N 002-58.4E
  31. HYDROLANT 1577/062006-08-29 → 2006-09-12
    Underwater operations in progress until further notice by M/V sea explorer vicinity 53-26N 002-55E
  32. HYDROLANT 1564/062006-08-26 → 2006-08-28
    Underwater operations in progress until further notice by M/V sea explorer vicinity 53-26N 002-55E
  33. HYDROLANT 1348/062006-07-18 → 2006-08-10
    Underwater operations in progress until further notice by M/V fugro explorer vicinity 53-28.2N 002-55.5E
  34. HYDROLANT 1326/062006-07-15 → 2006-08-01
    Underwater operations in progress until further notice by M/V castoro sei along trackline joining 52-52N…
  35. HYDROLANT 1178/062006-06-22 → 2006-08-02
    Submarine research operations in progress until further notice by M/V bibby aquamarine with submersible…
  36. HYDROLANT 1070/062006-06-04 → 2006-06-22
    Underwater operations in progress until further notice by M/V maersk assister within one mile of 52-54.5N…
  37. HYDROLANT 939/062006-05-16 → 2006-06-04
    Underwater operations in progress until further notice by M/V noordhoek singapore: a. within three miles of…
  38. HYDROLANT 931/062006-05-15 → 2006-05-19
    Survey operations in progress until 191200Z may by M/V quorn along trackline joining 51-49.7N 001-43.3E,…
  39. HYDROLANT 879/062006-05-08 → 2008-02-09
    Underwater operations in progress until further notice by barge tog mor vicinity 52-39N 002-27E
  40. HYDROLANT 837/062006-05-01 → 2006-05-12
    Underwater operations in progress until further notice by M/V noordhoek singapore with submersible along…
  41. HYDROLANT 735/062006-04-14 → 2006-04-21
    Underwater operations in progress until further notice by M/V leon thevenin vicinity 51-52.5N 003-04.0E
  42. HYDROLANT 421/062006-03-01 → 2006-03-10
    Underwater operations in progress until further notice by M/V grey mammoth vicinity 52-37.6N 001-46.0E
  43. HYDROLANT 272/062006-02-09 → 2006-02-13
    Underwater operations in progress until further notice by M/V cso orelia along trackline between 54-18.5N…
  44. HYDROLANT 2391/052005-12-23 → 2006-01-07
    Underwater operations 23 dec to 06 jan by M/V mermaid commander along trackline between 54-18.5N 002-25.2E…
  45. HYDROLANT 2378/052005-12-20 → 2005-12-21
    Survey operations in progress until further notice by M/V triton within one mile of 53-27.5N 002-56.3E
  46. HYDROLANT 2375/052005-12-19 → 2005-12-20
    Survey operations in progress until further notice by M/V triton within one mile of 53-27.5N 002-56.3E
  47. HYDROLANT 2339/052005-12-14 → 2005-12-16
    Survey operations in progress until further notice by M/V triton within one mile of 53-27.5N 002-56.3E
  48. HYDROLANT 2338/052005-12-14 → 2005-12-20
    Underwater operations in progress until further notice by M/V geobay along trackline between 54-01.0N…
  49. HYDROLANT 2009/052005-11-03 → 2005-11-11
    Underwater operations in progress until further notice by M/V island frontier vicinity 58-16.9N 000-14.2E
  50. HYDROLANT 1973/052005-10-30 → 2005-11-01
    Underwater operations in progress until further notice by M/V normand progress along trackline between…

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 North Sea — page 7 · seahazards