North Sea

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

in force
1
last 12 months
6
since 1997
4,731
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 aids2,50253%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,730 cancelled

  1. HYDROLANT 1234/07 · Nav aids2007-07-12 → 2007-07-13
    Pentland skerries light 58-41.4N 002-55.4W unreliable
  2. HYDROLANT 1226/07 · Nav aids2007-07-11 → 2008-02-09
    Nga chart 35046 (0 ed)
  3. HYDROLANT 1217/07 · Nav aids2007-07-10 → 2007-07-12
    Nga chart 37028 (0 ed)
  4. HYDROLANT 1216/07 · Surveys2007-07-10 → 2007-07-23
    Underwater operations in progress until further notice by M/V acergy falcon along trackline between 58-02.2N…
  5. HYDROLANT 1135/07 · Nav aids2007-06-30 → 2007-06-30
    Mrcc shetland 60-09N 001-08W mf dsc off air
  6. HYDROLANT 1118/07 · Wrecks2007-06-27 → 2007-08-08
    The following traffic separation schemes (tss), precautionary areas, designated routes, navigational aids,…
  7. HYDROLANT 1051/07 · Nav aids2007-06-18 → 2007-06-19
    Nga chart 37057 (1ST ed)
  8. HYDROLANT 1023/07 · Cable ops2007-06-13 → 2007-07-10
    Seismic survey in progress by M/V northern genesis towing 8000 meter cable in area bound by 58-24.1N…
  9. HYDROLANT 1022/07 · Nav aids2007-06-13 → 2007-07-09
    Skroo light 59-33.2N 001-36.5W range temporarily reduced to ten miles
  10. HYDROLANT 1021/07 · Nav aids2007-06-13 → 2007-06-14
    Dgps station at sumburgh head light 59-52.3N 001-16.5W off air 140930Z to 141100Z jun
  11. HYDROLANT 1004/07 · Nav aids2007-06-11 → 2007-06-14
    Dgps station at flamborough head light 54-07.0N 000-04.9W off air 0800Z to 1600Z daily 12 thru 14 jun
  12. HYDROLANT 1002/07 · Nav aids2007-06-11 → 2007-06-12
    Fog signal at platform 49/17GD 53-26.5N 002-15.1E inoperative
  13. HYDROLANT 1000/07 · Nav aids2007-06-11 → 2007-06-14
    Shell barque platform light 53-34.79N 001-38.0E unlit
  14. HYDROLANT 989/07 · Nav aids2007-06-09 → 2007-06-10
    RACON at cromer light 52-55.5N 001-19.1E off air
  15. HYDROLANT 985/07 · Cable ops2007-06-09 → 2007-07-05
    Pipeline operations in progress until further notice by cableship apache in vicinity of trackline between…
  16. HYDROLANT 984/07 · Nav aids2007-06-08 → 2007-06-13
    Skroo light 59-33.2N 001-36.5W unlit
  17. HYDROLANT 975/07 · Other2007-06-08 → 2008-02-09
    Unexploded ordnance in 52-23.12N 002-43.22E
  18. HYDROLANT 932/07 · Nav aids2007-06-01 → 2007-06-12
    Chiswick platform 53-56.4N 002-44.8E unlit
  19. HYDROLANT 849/07 · Cable ops2007-05-21 → 2007-12-02
    Seismic survey in progress until further notice by M/V sea profiler towing 400 meter long cable within three…
  20. HYDROLANT 846/07 · Other2007-05-20 → 2007-07-01
    Pipelaying operations in progress until further notice by M/V lorelay along trackline joining 53-28.2N…

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