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 881/05 · Nav aids2005-05-10 → 2005-12-08
    Dyck buoy 51-03N 001-52E off station
  2. HYDROLANT 851/05 · Nav aids2005-05-06 → 2005-05-06
    Dsc station trusthorpe 53-19N 000-16E off air
  3. HYDROLANT 848/05 · Nav aids2005-05-06 → 2006-08-16
    Fog signal at bergues bank buoy 51-17.2N 002-18.7E discontinued
  4. HYDROLANT 788/05 · Other2005-04-26 → 2005-12-08
    All navigational aids at the following platforms inoperative: a. NSR-R1 53-56N 002-24E
  5. HYDROLANT 786/05 · Other2005-04-26 → 2005-05-02
    Unexploded ordnance in 51-24.3N 002-15.2E
  6. HYDROLANT 777/05 · Cable ops2005-04-26 → 2006-02-01
    Pipelaying operations in progress until further notice by cableship appache along trackline between 57-05N…
  7. HYDROLANT 748/05 · Other2005-04-21 → 2006-02-01
    Pipelaying operations in progress until further notice by laybarge 200 along trackline joining 58-10N…
  8. HYDROLANT 734/05 · Other2005-04-19 → 2005-10-05
    Pipelaying operations in progress until further notice by M/V castoro sei along trackline between 60-07.8N…
  9. HYDROLANT 721/05 · Nav aids2005-04-18 → 2005-04-18
    Welland platform 53/4A in 52-59.0N 002-44.0E unlit
  10. HYDROLANT 699/05 · Nav aids2005-04-15 → 2005-04-19
    Fog signal at st 2 platform 54-03N 001-02E inoperative
  11. HYDROLANT 690/05 · Nav aids2005-04-14 → 2005-10-05
    Lights unreliable: 1. pentland skerries light 58-41.4N 002-55.4W
  12. HYDROLANT 654/05 · Cable ops2005-04-09 → 2005-04-12
    Underwater operations in progress until further notice by cableship peter faber vicinity 51-05.5N 001-50.0E
  13. HYDROLANT 641/05 · Other2005-04-07 → 2005-05-19
    Unexploded ordnance in: a. 52-22.15N 002-55.35E
  14. HYDROLANT 582/05 · Surveys2005-03-31 → 2005-04-05
    Underwater operations in progress until further notice by M/V bucentaur vicinity 53-25.8N 002-53.9E
  15. HYDROLANT 540/05 · Cable ops2005-03-24 → 2005-03-30
    Seismic survey operations in progress until further notice by M/V sea explorer towing 600 meter long cable…
  16. HYDROLANT 538/05 · Nav aids2005-03-24 → 2005-03-24
    Whitby high light 54-28.6N 000-34.0W range unreliable
  17. HYDROLANT 454/05 · Other2005-03-08 → 2005-03-10
    Firths voe light 60-27N 001-11W at reduced intensity
  18. HYDROLANT 444/05 · Cable ops2005-03-07 → 2005-03-21
    Pipeline operations in progress until further notice by M/V castro 6 along trackline between 52-54N 002-36E…
  19. HYDROLANT 383/05 · Containers2005-02-25 → 2005-02-25
    Container adrift vicinity 51-58.9N 001-50.3E at 251157Z feb
  20. HYDROLANT 378/05 · Containers2005-02-24 → 2005-02-24
    Container adrift vicinity 52-03.9N 002-14.0E at 241142Z feb

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