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 1891/052005-10-17 → 2005-11-23
    Underwater operations in progress until further notice by vessel aquamarine along trackline between 54-00.9N…
  2. HYDROLANT 1638/052005-09-08 → 2005-09-14
    Underwater operations in progress until further notice by M/V normad pioneer along trackline between…
  3. HYDROLANT 1582/052005-08-30 → 2005-09-27
    Dangerous wreck in 53-38.5N 003-37.9E marked by two west cardinal buoys,racon(d) and one east cardinal buoy
  4. HYDROLANT 1435/052005-08-08 → 2006-02-01
    Survey operations in progress until further notice by M/V anglian soveveing in area bound by 59-05N 002-33W,…
  5. HYDROLANT 1350/052005-07-25 → 2005-07-28
    Survey operations in progress until further notice by M/V ramsey vicinity a. 51-03N 001-23E b. 51-15N…
  6. HYDROLANT 1321/052005-07-20 → 2005-07-22
    Survey operations in progress until further notice by M/V ramsey along trackline joining 51-03N 001-23E,…
  7. HYDROLANT 582/052005-03-31 → 2005-04-05
    Underwater operations in progress until further notice by M/V bucentaur vicinity 53-25.8N 002-53.9E
  8. HYDROLANT 1851/042004-11-15 → 2004-11-24
    Survey operations in progress until 260001Z nov by M/V fs laperous within four miles of 51-12.5N 002-04.5E
  9. HYDROLANT 1544/042004-09-21 → 2004-10-13
    Survey operations in progress until further notice by M/V bangor and M/V grimsby with submersibles along…
  10. HYDROLANT 1450/042004-09-04 → 2004-10-20
    Underwater operations in progress until further notice in areas: a. bound by 51-28.1N 001-03.2E, 51-28.4N…
  11. HYDROLANT 1437/042004-09-02 → 2004-09-27
    Underwater operations in progress until further notice vicinity of trackline between 51-48N 001-58E and…
  12. HYDROLANT 1278/042004-08-01 → 2004-08-06
    Underwater operations in progress until further notice by M/V ernest shackleton within 2 miles of 55-28N…
  13. HYDROLANT 1219/042004-07-20 → 2004-11-01
    Hydrographic survey in progress until further notice by M/V elinor th towing equipment in area bound by…
  14. HYDROLANT 1117/042004-07-03 → 2004-07-26
    Underwater operations in progress until further notice by M/V seaway eagle vicinity 57-34N 000-54W
  15. HYDROLANT 631/042004-04-16 → 2004-10-27
    Dangerous wreck in 51-22.00N 002-12.90E marked by south cardinal buoys in: a. 51-21.61N 002-12.20E
  16. HYDROLANT 434/042004-03-17 → 2004-03-26
    Submarine research operations in progress during daylight hours until 25 mar by M/V prince madog with…
  17. HYDROLANT 1291/032003-07-03 → 2004-04-16
    Salvage operations in progress until further notice vicinity 51-22.0N 002-12.9E
  18. HYDROLANT 1221/032003-06-24 → 2003-06-25
    Underwater operations in progress until further notice by M/V seaway petrel with submersible vicinity of…
  19. HYDROLANT 1098/032003-06-05 → 2003-06-09
    Underwater operations in progress until further notice by M/V sea explorer vicinity of trackline between…
  20. HYDROLANT 1054/032003-05-30 → 2003-06-05
    Survey operations in progress until further notice by M/V svitzer mercator within two miles of 53-09N 002-46E
  21. HYDROLANT 969/032003-05-17 → 2003-05-21
    Underwater operations in progress until further notice by M/V svitzer meridian towing three mile long cable…
  22. HYDROLANT 691/032003-04-03 → 2003-04-09
    Survey operations in progress until further notice by M/V confidante within 2.5 miles of 51-14N 001-51E
  23. HYDROLANT 636/032003-03-26 → 2003-03-31
    Survey operations in progress until further notice by M/V confidante 5 vicinity of trackline joining…
  24. HYDROLANT 582/032003-03-18 → 2003-03-26
    Underwater operations in progress until further notice by M/V terramare in 52-32.8N 002-03.8E
  25. HYDROLANT 554/032003-03-12 → 2003-03-23
    Survey operations in progress until further notice by M/V confidante in area bound by 51-44N 001-29E, 51-55N…
  26. HYDROLANT 395/032003-02-20 → 2003-02-22
    Underwater operations in progress until further notice by M/V goosander with submersible vicinity 51-29N…
  27. HYDROLANT 2848/022002-12-27 → 2004-04-16
    Dangerous wreck in 51-22.0N 002-12.8E marked by: a. north, east and west cardinal buoys
  28. HYDROLANT 2836/022002-12-24 → 2002-12-27
    Dangerous wreck in 51-21.9N 002-12.7E marked by: a. east and west cardinal buoys
  29. HYDROLANT 2056/022002-09-14 → 2002-09-22
    Oceanographic operations in progress until further notice by M/V triton within 1.5 miles of trackline…
  30. HYDROLANT 1953/022002-09-02 → 2002-09-04
    Underwater operations in progress until further notice by M/V aquamarine vicinity 53-10.3N 002-42.1E
  31. HYDROLANT 1934/022002-08-30 → 2002-08-31
    Underwater operations in progress until further notice by M/V aquamarine within one mile of 53-00.0N 002-40.3E
  32. HYDROLANT 1824/022002-08-17 → 2002-08-18
    Survey operations in progress until further notice by M/V flatholm within three miles of 51-48N 001-32E
  33. HYDROLANT 1226/022002-06-02 → 2002-06-02
    Underwater operations in progress until further notice by M/V highland fortress in area bound by 54-03N…
  34. HYDROLANT 1123/022002-05-18 → 2002-05-19
    Survey operations in progress until further notice by M/V confidante in area bound by 51-08.7N 001-41.2E,…
  35. HYDROLANT 1117/022002-05-16 → 2002-06-14
    Underwater operations in progress until further notice by M/V jean charcot towing one mile long cable along…
  36. HYDROLANT 1009/022002-05-01 → 2002-06-28
    Underwater operations in progress until further notice by M/V cso constructor in area between 57-10.2N…
  37. HYDROLANT 3032/012001-11-27 → 2001-11-29
    Underwater operations in progress until further notice by vessel aquamarine vicinity 52-59.9N 002-41.0E
  38. HYDROLANT 2392/012001-09-03 → 2001-09-03
    Underwater operations in progress until further notice by M/V havila reel vicinity of trackline between…
  39. HYDROLANT 2266/012001-08-17 → 2001-08-17
    Underwater operations in progress until further notice by M/V havila reel vicinity 54-11N 000-12E
  40. HYDROLANT 2262/012001-08-16 → 2001-08-16
    Underwater operations in progress until further notice by M/V seaway rover vicinity 54-40N 000-51E
  41. HYDROLANT 2257/012001-08-15 → 2001-08-18
    Underwater operations in progress until further notice by M/V neftegaz 66 vicinity of trackline between…
  42. HYDROLANT 2150/012001-08-01 → 2001-08-14
    Underwater operations in progress until further notice by M/V seaway rover vicinity of trackline between…
  43. HYDROLANT 2123/012001-07-29 → 2001-07-30
    Underwater operations in progress until further notice by M/V highland fortress in areas: a. within one mile…
  44. HYDROLANT 2111/012001-07-28 → 2001-07-29
    Underwater operations in progress until further notice by M/V normand tonjer with submersible vicinity of…
  45. HYDROLANT 2091/012001-07-26 → 2001-07-27
    Underwater operations in progress until further notice by M/V eas vicinity 52-50N 002-42E
  46. HYDROLANT 2079/012001-07-25 → 2001-07-29
    Underwater operations in progress until further notice by M/V highland fortress vicinity of trackline…
  47. HYDROLANT 2076/012001-07-24 → 2001-07-25
    Underwater operations in progress until further notice by M/V highland fortress within one mile of 51-07N…
  48. HYDROLANT 2072/012001-07-24 → 2001-07-26
    Underwater operations in progress until further notice by M/V eas vicinity of 53-17N 002-25E
  49. HYDROLANT 2058/012001-07-23 → 2001-07-24
    Underwater operations in progress until further notice by M/V eas vicinity of 53-29N 002-25E
  50. HYDROLANT 2033/012001-07-19 → 2001-07-23
    Underwater operations in progress until further notice by M/V eas vicinity 53-34N 002-25E

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 8 · seahazards