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 2835/00 · Surveys2000-08-13 → 2000-08-13
    Underwater operations in progress until further notice by M/V mirfak vicinity of trackline between 54-11N…
  2. HYDROLANT 2823/00 · Cable ops2000-08-12 → 2000-08-13
    Cable operations in progress until further notice by M/V northern prince vicinity of trackline between…
  3. HYDROLANT 2822/00 · Cable ops2000-08-12 → 2000-08-24
    Cable operations in progress until further notice by cableship monarch within one mile of 52-26N 001-49E
  4. HYDROLANT 2812/00 · Surveys2000-08-11 → 2000-08-15
    Survey operations in progress until further notice by M/V ernest shackleton vicinity of trackline between…
  5. HYDROLANT 2779/00 · Surveys2000-08-09 → 2000-08-12
    Underwater operations in progress until further notice by M/V neetegaz 66 vicinity of trackline between…
  6. HYDROLANT 2777/00 · Cable ops2000-08-09 → 2000-08-11
    Cable operations in progress until further notice by M/V nordica vicinity of trackline between 52-29N…
  7. HYDROLANT 2765/00 · Cable ops2000-08-08 → 2000-08-12
    Cable operations in progress until further notice by cableship monarch within one mile of 51-14N 002-20E
  8. HYDROLANT 2751/00 · Cable ops2000-08-07 → 2000-08-09
    Cable operations in progress until further notice by M/V nordica vicinity of trackline joining 52-27N…
  9. HYDROLANT 2744/00 · Surveys2000-08-06 → 2000-08-09
    Underwater operations in progress until further notice by M/V neetegaz 66 vicinity of trackline joining…
  10. HYDROLANT 2737/00 · Surveys2000-08-05 → 2000-08-06
    Underwater operations in progress until further notice by M/V neetegaz 66 vicinity of trackline between…
  11. HYDROLANT 2736/00 · Nav aids2000-08-05 → 2000-08-07
    Ruytingen west buoy 51-06.9N 001-51.0E unlit
  12. HYDROLANT 2725/00 · Surveys2000-08-04 → 2000-09-27
    Underwater operations in progress until further notice by M/V goosander anchored in 51-22.3N 002-40.4E
  13. HYDROLANT 2714/00 · Surveys2000-08-03 → 2000-08-04
    Underwater operations in progress until further notice by M/V neetegaz 66 vicinity of trackline between…
  14. HYDROLANT 2700/00 · Cable ops2000-08-02 → 2000-08-07
    Cable operations in progress until further notice by M/V nordica vicinity of trackline joining 52-27N…
  15. HYDROLANT 2687/00 · Surveys2000-08-01 → 2000-08-03
    Underwater operations in progress until further notice by M/V neetegaz 66 vicinity of trackline between…
  16. HYDROLANT 2677/00 · Other2000-07-31 → 2000-08-04
    Four-point mooring within 700 meters of 51-22.28N 002-30.43E
  17. HYDROLANT 2655/00 · Cable ops2000-07-29 → 2000-08-04
    Cable operations in progress until further notice by M/V northern prince vicinity 51-04N 001-53E
  18. HYDROLANT 2648/00 · Cable ops2000-07-28 → 2000-08-08
    Underwater operations in progress until further notice by cableship monarch within one mile of 51-15N 002-25E
  19. HYDROLANT 2643/00 · Nav aids2000-07-28 → 2000-07-28
    Saint abbs head light 55-55N 002-08W unreliable
  20. HYDROLANT 2621/00 · Other2000-07-26 → 2000-07-26
    Girdle ness light 57-08N 002-03W at reduced intensity

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