North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
7
since 1997
4,732
categories
11

In force now · 1

  1. HYDROLANT 1496/26 · Surveys2026-08-03
    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.

Longest in force

  1. HYDROLANT 1496/26 · Surveys2026-08-03
    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.

By year

97
98
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

By category · since 1997

Nav aids2,50353%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,731 cancelled

  1. HYDROLANT 1923/99 · Cable ops1999-09-09 → 1999-10-20
    Seismic survey in progress until further notice by M/V american explorer in area bound by 54-11N 001-50E,…
  2. HYDROLANT 1914/99 · Nav aids1999-09-08 → 1999-09-17
    Stroma light 58-42N 003-07W unreliable
  3. HYDROLANT 1913/99 · Nav aids1999-09-07 → 1999-09-08
    Stroma light 58-42N 003-07W unlit
  4. HYDROLANT 1911/99 · Nav aids1999-09-07 → 1999-09-08
    Bell rock light 56-26N 002-23W range temporarily reduced to nine miles
  5. HYDROLANT 1897/99 · Cable ops1999-09-06 → 1999-11-12
    Cable buoy with ra ref marking exposed submarine cable temporarily established in 51-04.4N 001-53.1E
  6. HYDROLANT 1874/99 · Surveys1999-09-03 → 1999-09-05
    Underwater operations in progress until further notice by M/V goosander between 52-13N 001-56E and 52-25N…
  7. HYDROLANT 1869/99 · Surveys1999-09-03 → 1999-09-03
    Underwater operations in progress until further notice by M/V goosander between 52-12N 001-39E and 52-13N…
  8. HYDROLANT 1867/99 · Nav aids1999-09-02 → 1999-09-03
    Clythness light 58-19N 003-13W unreliable
  9. HYDROLANT 1854/99 · Nav aids1999-09-01 → 1999-09-01
    Gregness mf dsc station 57-07N 002-03W off air
  10. HYDROLANT 1836/99 · Nav aids1999-08-30 → 1999-08-31
    Flamborough head light 54-07N 000-05W unreliable
  11. HYDROLANT 1817/99 · Other1999-08-28 → 1999-08-31
    M/V ever decent at anchor in 51-28.7N 001-48.0E wide berth requested
  12. HYDROLANT 1812/99 · Other1999-08-28 → 1999-08-28
    M/V ever decent with hazardous cargo on fire vicinity 51-23.5N 001-43.4E at 272350Z aug
  13. HYDROLANT 1809/99 · Nav aids1999-08-27 → 1999-08-29
    Newarp lightfloat 52-48.3N 001-55.8E unreliable
  14. HYDROLANT 1803/99 · Nav aids1999-08-27 → 1999-09-01
    Dyck buoy 51-03N 001-52E unlit
  15. HYDROLANT 1792/99 · Derelicts1999-08-25 → 1999-08-28
    M/V ever decent with hazardous cargo on fire and adrift vicinity 51-27N 001-47E at 251500Z aug
  16. HYDROLANT 1790/99 · Cable ops1999-08-25 → 1999-08-31
    Cable operations in progress until further notice by cableship monarch vicinity 51-35N 002-59E
  17. HYDROLANT 1782/99 · Derelicts1999-08-25 → 1999-08-25
    M/V ever decent with hazardous cargo on fire and adrift vicinity 51-27N 001-46E at 250645Z aug
  18. HYDROLANT 1781/99 · Derelicts1999-08-25 → 1999-08-25
    M/V ever decent with hazardous cargo on fire and adrift vicinity 51-20N 001-43E at 250010Z aug
  19. HYDROLANT 1779/99 · Other1999-08-24 → 1999-08-25
    Vessel with hazardous cargo on fire in 51-16.5N 001-40.6E at 242030Z aug
  20. HYDROLANT 1774/99 · Derelicts1999-08-24 → 1999-08-24
    Vessel with hazardous cargo on fire and adrift in 51-18.6N 001-41.2E at 240900Z aug

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.