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 1489/002000-04-27 → 2000-04-27
    Underwater operations in progress until further notice by M/V ace nature vicinity 52-12.7N 001-52.5E
  2. HYDROLANT 1479/002000-04-26 → 2000-04-28
    Underwater operations in progress until further notice by M/V toisa gryphon vicinity of trackline joining…
  3. HYDROLANT 1476/002000-04-26 → 2000-04-28
    Survey operations in progress until further notice by M/V proud seahorse along trackline between 51-42N…
  4. HYDROLANT 1415/002000-04-21 → 2000-04-24
    Underwater operations in progress until further notice by M/V toisa gryphon vicinity of trackline joining…
  5. HYDROLANT 1409/002000-04-21 → 2000-04-22
    Underwater operations in progress until further notice by M/V goosander with submersible vicinity 51-20N…
  6. HYDROLANT 1402/002000-04-20 → 2000-04-26
    Underwater operations in progress until further notce by M/V ace nature with submersible vicinity 51-59N…
  7. HYDROLANT 1334/002000-04-15 → 2000-04-20
    Underwater operations in progress until further notice by M/V goosander with submersible vicinity 51-22N…
  8. HYDROLANT 1247/002000-04-08 → 2000-04-08
    Underwater operations in progress until further notice by M/V mansal 18 with submersible along trackline…
  9. HYDROLANT 1195/002000-04-05 → 2000-04-07
    Underwater operations in progress until further notice by M/V toisa gryphon vicinity of trackline between…
  10. HYDROLANT 1131/002000-03-31 → 2000-04-01
    Underwater operations in progress until further notice by M/V toisa gryphon vicinity of trackline between…
  11. HYDROLANT 733/002000-02-26 → 2000-02-27
    Underwater operations in progress until further notice by M/V aquamarine and M/V trendsetter vicinity…
  12. HYDROLANT 623/002000-02-19 → 2000-03-03
    Underwater operations in progress until further notice by M/V aquamarine vicinity 51-22.4N 001-42.6E
  13. HYDROLANT 579/002000-02-15 → 2000-02-27
    Underwater operations in progress until further notice by M/V goosander vicinity 51-21.4N 001-32.9E
  14. HYDROLANT 578/002000-02-15 → 2000-02-19
    Underwater operations in progress until further notice by M/V aquamarine vicinity 51-20.6N 001-50.0E
  15. HYDROLANT 565/002000-02-14 → 2000-02-15
    Underwater operations in progress until further notice by M/V aquamarine vicinity 51-20.1N 001-58.5E
  16. HYDROLANT 296/002000-01-26 → 2000-01-28
    Underwater operations in progress until further notice by M/V brodospas star between 52-29N 003-11E and…
  17. HYDROLANT 277/002000-01-25 → 2000-01-26
    Underwater operations in progress until further notice by M/V brodospas star between 52-29N 002-50E and…
  18. HYDROLANT 247/002000-01-23 → 2000-01-25
    Underwater operations in progress until further notice by M/V brodospas star in area between 52-29N 002-26E…
  19. HYDROLANT 210/002000-01-20 → 2000-01-22
    Underwater operations in progress until further notice by M/V brodospas star vicinity of trackline between…
  20. HYDROLANT 204/002000-01-19 → 2000-01-20
    Underwater operations in progress until further notice by M/V brodospas star vicinity of trackline between…
  21. HYDROLANT 169/002000-01-17 → 2000-01-18
    Underwater operations in progress until further notice by M/V brodospas star vicinity of trackline between…
  22. HYDROLANT 2652/991999-12-08 → 1999-12-09
    Underwater operations in progress until further notice by M/V polar prince vicinity of trackline between…
  23. HYDROLANT 2640/991999-12-07 → 1999-12-08
    Underwater operations in progress until further notice by M/V polar prince vicinity 51-21N 001-50E
  24. HYDROLANT 2629/991999-12-05 → 1999-12-15
    Underwater operations in progress until further notice by M/V granit between 52-03N 002-08E and 52-11N 001-51E
  25. HYDROLANT 2546/991999-11-26 → 1999-11-28
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  26. HYDROLANT 2536/991999-11-26 → 1999-11-30
    Underwater operations in progress until further notice by M/V brodospas moon along trackline joining 52-11N…
  27. HYDROLANT 2513/991999-11-23 → 1999-11-30
    Underwater operations in progress until further notice by M/V granit vicinity of trackline between 52-20N…
  28. HYDROLANT 2501/991999-11-22 → 1999-11-26
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  29. HYDROLANT 2496/991999-11-21 → 1999-11-22
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  30. HYDROLANT 2493/991999-11-21 → 1999-11-23
    Underwater operations in progress until further notice by M/V granit vicinity of trackline between 52-23N…
  31. HYDROLANT 2482/991999-11-19 → 1999-11-21
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  32. HYDROLANT 2467/991999-11-17 → 1999-11-19
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  33. HYDROLANT 2466/991999-11-17 → 1999-11-17
    Underwater operations in progress until further notice by M/V granit vicinity of trackline between 52-25N…
  34. HYDROLANT 2444/991999-11-14 → 1999-11-17
    Underwater operations in progress until further notice by M/V brodospas moon vicinity of trackline between…
  35. HYDROLANT 2438/991999-11-13 → 1999-11-17
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  36. HYDROLANT 2382/991999-11-07 → 1999-11-13
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  37. HYDROLANT 2356/991999-11-04 → 1999-11-06
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  38. HYDROLANT 2319/991999-10-30 → 1999-11-02
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  39. HYDROLANT 2315/991999-10-30 → 1999-11-03
    Salvage operations in progress until further notice in 57-48.80N 003-17.35W
  40. HYDROLANT 2292/991999-10-27 → 1999-10-30
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  41. HYDROLANT 2265/991999-10-23 → 1999-10-27
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  42. HYDROLANT 2233/991999-10-18 → 1999-10-23
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  43. HYDROLANT 2223/991999-10-16 → 1999-10-18
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  44. HYDROLANT 2191/991999-10-13 → 1999-10-16
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  45. HYDROLANT 2173/991999-10-11 → 1999-11-03
    Underwater operations in progress until further notice by M/V well servicer between 57-01.9N 001-57.4E and…
  46. HYDROLANT 2172/991999-10-11 → 1999-10-13
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  47. HYDROLANT 2161/991999-10-09 → 1999-10-11
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  48. HYDROLANT 2142/991999-10-07 → 1999-10-08
    Underwater operations in progress until further notice by M/V goosander vicinity of trackline between 51-23N…
  49. HYDROLANT 2141/991999-10-07 → 1999-10-09
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  50. HYDROLANT 2131/991999-10-06 → 1999-10-07
    Underwater operations in progress until further notice by M/V goosander along trackline between 51-23N…

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 11 · seahazards