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 2025/012001-07-18 → 2001-07-19
    Underwater operations in progress until further notice by M/V eas vicinity 52-37.3N 002-16.6E
  2. HYDROLANT 1992/012001-07-15 → 2001-07-15
    Underwater operations in progress until further notice by M/V eas vicinity 52-33.9N 002-14.3E
  3. HYDROLANT 1968/012001-07-12 → 2001-07-15
    Underwater operations in progress until further notice by M/V eas vicinity 52-32.2N 002-13.3E
  4. HYDROLANT 1948/012001-07-10 → 2001-07-24
    Underwater operations in progress until further notice by M/V skandi neptune within three miles of 54-30N…
  5. HYDROLANT 1946/012001-07-10 → 2001-07-16
    Underwater operations in progress until further notice by M/V havila reel vicinity 51-13N 002-07E
  6. HYDROLANT 1943/012001-07-10 → 2001-07-10
    Underwater operations in progress until further notice by M/V havila reel vicinity 51-11N 002-07E
  7. HYDROLANT 1928/012001-07-08 → 2001-07-10
    Underwater operations in progress until further notice by M/V havila reel vicinity of trackline beteen…
  8. HYDROLANT 1927/012001-07-08 → 2001-07-12
    Underwater operations in progress until further notice by M/V eas vicinity 53-42.8N 002-23.2E
  9. HYDROLANT 1921/012001-07-07 → 2001-07-08
    Underwater operations in progress until further notice by M/V eas vicinity 53-44.3N 002-23.1E
  10. HYDROLANT 1914/012001-07-06 → 2001-07-07
    Underwater operations in progress until further notice by M/V eas vicinity 53-46N 002-23E
  11. HYDROLANT 1905/012001-07-05 → 2001-07-08
    Underwater operations in progress until further notice by M/V havila reel vicinity 51-03.7N 001-45.9E
  12. HYDROLANT 1902/012001-07-05 → 2001-07-06
    Underwater operations in progress until further notice by M/V eas vicinity 53-49N 002-23E
  13. HYDROLANT 1894/012001-07-04 → 2001-07-05
    Underwater operations in progress until further notice by M/V eas vicinity 53-51N 002-22E
  14. HYDROLANT 1886/012001-07-04 → 2001-07-10
    Underwater operations in progress until further notice by barge fetsy l with M/V ada d and M/V neptune 6…
  15. HYDROLANT 1880/012001-07-03 → 2001-07-04
    Underwater operations in progress until further notice by M/V eas vicinity 52-29.5N 002-11.6E
  16. HYDROLANT 1876/012001-07-02 → 2001-07-03
    Underwater operations in progress until further notice by M/V eas vicinity 52-29.4N 002-04.0E
  17. HYDROLANT 1870/012001-07-01 → 2001-07-02
    Underwater operations in progress until further notice by M/V eas vicinity 52-29.4N 002-11.7E
  18. HYDROLANT 1861/012001-06-30 → 2001-07-01
    Underwater operations in progress until further notice by M/V eas vicinity 52-25.9N 002-04.5E
  19. HYDROLANT 1853/012001-06-29 → 2001-06-30
    Underwater operations in progress until further notice by M/V eas vicinity 52-25.7N 002-00.6E
  20. HYDROLANT 1847/012001-06-28 → 2001-06-29
    Underwater operations in progress until further notice by M/V eas vicinity 52-25.7N 002-00.6E
  21. HYDROLANT 1841/012001-06-27 → 2001-07-02
    Survey operations in progress until further notice by M/V la perouse within two miles of 51-05N 001-47E
  22. HYDROLANT 1840/012001-06-27 → 2001-06-28
    Underwater operations in progress until further notice by M/V eas vicinity 52-25.5N 002-00.5E
  23. HYDROLANT 1833/012001-06-26 → 2001-06-27
    Underwater operations in progress until further notice by M/V eas vicinity 53-57N 002-22E
  24. HYDROLANT 1827/012001-06-25 → 2001-06-26
    Underwater operations in progress until further notice by M/V eas vicinity 54-11N 002-20E
  25. HYDROLANT 1793/012001-06-21 → 2001-06-21
    Underwater operations in progress until further notice by M/V eas vicinity of trackline between 52-27N…
  26. HYDROLANT 1775/012001-06-19 → 2001-06-21
    Underwater operations in progress until further notice by M/V eas vicinity of trackline joining 52-27N…
  27. HYDROLANT 1715/012001-06-13 → 2001-06-17
    Underwater operations in progress until further notice by M/V normand vester vicinity of trackline between…
  28. HYDROLANT 1707/012001-06-12 → 2001-06-13
    Underwater operations in progress until further notice by M/V normand vester vicinity 51-06N 001-53E
  29. HYDROLANT 1588/012001-06-01 → 2001-06-07
    Underwater operations in progress until further notice by M/V normand vester vicinity 51-21N 002-24E
  30. HYDROLANT 1550/012001-05-29 → 2001-06-01
    Underwater operations in progress until further notice by M/V normand vester vicinity of trackline between…
  31. HYDROLANT 1529/012001-05-26 → 2001-05-29
    Underwater operations in progress until further notice by M/V normand vester vicinity of trackline between…
  32. HYDROLANT 1155/012001-04-14 → 2001-05-14
    Underwater operations in progress until further notice by M/V discovery vicinity of trackline between 53-14N…
  33. HYDROLANT 856/012001-03-14 → 2001-03-16
    Underwater operations in progress until further notice by M/V monarch vicinity 51-11N 002-01E
  34. HYDROLANT 817/012001-03-11 → 2001-03-14
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  35. HYDROLANT 799/012001-03-10 → 2001-03-11
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  36. HYDROLANT 774/012001-03-07 → 2001-03-10
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  37. HYDROLANT 763/012001-03-07 → 2001-03-07
    Underwater operations in progress until further notice by M/V maersk forwarder vicinity of trackline between…
  38. HYDROLANT 733/012001-03-04 → 2001-03-07
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  39. HYDROLANT 711/012001-03-02 → 2001-03-04
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  40. HYDROLANT 692/012001-02-28 → 2001-03-02
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  41. HYDROLANT 672/012001-02-25 → 2001-02-27
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  42. HYDROLANT 663/012001-02-24 → 2001-08-13
    Hydrogaphic survey in progress until further notice by M/V marine explorer towing equipment in area bound by…
  43. HYDROLANT 649/012001-02-23 → 2001-02-25
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  44. HYDROLANT 528/012001-02-13 → 2001-02-14
    Underwater operations in progress until further notice by M/V pasvik vicinity of trackline joining 51-14N…
  45. HYDROLANT 517/012001-02-11 → 2001-02-13
    Underwater operations in progress until further notice by M/V pasvik vicinity of trackline joining 51-20N…
  46. HYDROLANT 512/012001-02-11 → 2001-02-11
    Underwater operations in progress until further notice by M/V pasvik vicinity of trackline joining 51-31N…
  47. HYDROLANT 3751/002000-11-07 → 2000-11-10
    Underwater operations in progress until further notice by M/V ace venture vicinity of trackline between…
  48. HYDROLANT 3716/002000-11-04 → 2000-11-06
    Underwater operations in progress until further notice by M/V ace nature vicinity of trackline between…
  49. HYDROLANT 3706/002000-11-04 → 2000-11-04
    Underwater operations in progress until further notice by M/V ace nature vicinity of trackline between…
  50. HYDROLANT 3695/002000-11-03 → 2000-11-10
    Underwater operations in progress until further notice by M/V fennica vicinity 52-28N 002-11E

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 9 · seahazards