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 1225/05 · Other2005-07-01 → 2005-07-29
    Unexploded ordnance in: a. 52-50.2N 002-22.4E
  2. HYDROLANT 1224/05 · Other2005-06-30 → 2005-07-01
    Unexploded ordnance in 52-50.2N 002-22.4E
  3. HYDROLANT 1212/05 · Nav aids2005-06-28 → 2005-07-13
    Fog signal at swilkie point light 58-41.8N 003-07.0W discontinued
  4. HYDROLANT 1211/05 · Nav aids2005-06-28 → 2006-08-16
    Fog signal at pentland skerries light 58-41.4N 002-55.4W discontinued
  5. HYDROLANT 1190/05 · Nav aids2005-06-24 → 2006-03-09
    Fog signal at skaden light 59-30.9N 001-39.0W discontinued
  6. HYDROLANT 1178/05 · Cable ops2005-06-22 → 2005-08-17
    Seismic survey in progress until further notice by M/V northern explorer towing 4.5 mile cable in area bound…
  7. HYDROLANT 1142/05 · Other2005-06-17 → 2006-08-16
    Unexploded ordnance vicinity 52-49N 002-07E
  8. HYDROLANT 1139/05 · Nav aids2005-06-16 → 2005-06-24
    Fog signal at pentland skerries light 58-41N 002-55W discontinued
  9. HYDROLANT 1114/05 · Nav aids2005-06-14 → 2005-06-16
    Dgps station at flamborough head light 54-07.0N 000-04.8W off air 0800Z to 1500Z daily 14 thru 16 jun
  10. HYDROLANT 1085/05 · Nav aids2005-06-10 → 2005-06-10
    Sumburgh head dgps station 59-51.3N 001-16.5W off air 100900Z to 101500Z jun
  11. HYDROLANT 1084/05 · Other2005-06-09 → 2006-01-24
    Unexploded ordnance in 52-45.71N 002-02.72E
  12. HYDROLANT 1079/05 · Other2005-06-09 → 2005-06-20
    Pipelaying operations in progress until further notice by M/V normand pioneer, M/V normand clipper and M/V…
  13. HYDROLANT 1068/05 · Other2005-06-08 → 2005-06-20
    Pipelaying operations in progress until further notice by M/V seaway falcon within one mile of 52-54.2N…
  14. HYDROLANT 1061/05 · Nav aids2005-06-07 → 2005-06-08
    Dgps station at sumburgh head light 59-51.3N 001-16.3W off air 0900Z to 1530Z 07 and 08 jun
  15. HYDROLANT 1054/05 · Cable ops2005-06-05 → 2005-06-10
    Underwater operations in progress until further notice by cableship peter faber vicinity of trackline…
  16. HYDROLANT 1040/05 · Nav aids2005-06-02 → 2005-06-21
    Hinder 1 buoy 51-21N 002-11E missing
  17. HYDROLANT 973/05 · Nav aids2005-05-24 → 2005-05-25
    Sandettie southwest lightbuoy 51-10N 001-46E unlit
  18. HYDROLANT 944/05 · Other2005-05-19 → 2006-01-24
    Unexploded ordnance in 52-17.04N 002-43.11E
  19. HYDROLANT 923/05 · Cable ops2005-05-17 → 2005-05-24
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-21.1N 002-49.7E
  20. HYDROLANT 918/05 · Nav aids2005-05-16 → 2005-05-17
    Dsc station gregness 57-08N 002-03W unreliable

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