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 989/00 · Nav aids2000-03-20 → 2000-03-21
    Platform (44/21) 54-15N 002-09E unlit and fog signal inoperative
  2. HYDROLANT 967/00 · Other2000-03-18 → 2000-03-19
    Fairy south buoy 51-21N 002-17E unreliable
  3. HYDROLANT 955/00 · Nav aids2000-03-17 → 2000-03-18
    Copinsay light 58-54N 002-40W unreliable
  4. HYDROLANT 954/00 · Cable ops2000-03-16 → 2000-04-07
    Cable operations in progress until further notice by M/V seaworker vicinity of trackline between 51-20.5N…
  5. HYDROLANT 873/00 · Nav aids2000-03-09 → 2000-03-10
    Dsc stations windyhead 57-39N 002-15W and peterhead 57-31N 001-46W off air
  6. HYDROLANT 864/00 · Nav aids2000-03-08 → 2000-03-09
    Swilkie point light 58-42N 003-07W unreliable
  7. HYDROLANT 861/00 · Nav aids2000-03-08 → 2000-06-09
    Fog signal at buchan ness light 57-28N 001-46W discontinued
  8. HYDROLANT 848/00 · Nav aids2000-03-07 → 2000-03-09
    Auskerry light 59-02N 002-34W unreliable
  9. HYDROLANT 842/00 · Nav aids2000-03-06 → 2000-03-07
    Duncansby head light 58-39N 003-01W unreliable
  10. HYDROLANT 841/00 · Nav aids2000-03-06 → 2000-03-20
    Fairy south buoy 51-21N 002-17E unlit
  11. HYDROLANT 825/00 · Cable ops2000-03-06 → 2000-03-11
    Cable operations in progress until further notice by M/V goosander with submersible vicinity 51-21.4N…
  12. HYDROLANT 821/00 · Wrecks2000-03-05 → 2002-01-03
    Dangerous wreck marked by two west cardinal buoys in 52-13.1N 003-30.0E
  13. HYDROLANT 817/00 · Cable ops2000-03-05 → 2000-03-12
    Cable operations in progress until further notice by cableship monarch within one mile of 51-31.9N 001-55.0E
  14. HYDROLANT 816/00 · Cable ops2000-03-05 → 2000-03-05
    Cable operations in progress until further notice by cableship monarch within one mile of 51-31.9N 002-55.0E
  15. HYDROLANT 742/00 · Nav aids2000-02-28 → 2000-02-28
    Long sand head buoy 51-48N 001-40E unlit
  16. HYDROLANT 733/00 · Surveys2000-02-26 → 2000-02-27
    Underwater operations in progress until further notice by M/V aquamarine and M/V trendsetter vicinity…
  17. HYDROLANT 725/00 · Cable ops2000-02-26 → 2000-02-26
    Cable operations in progress until further notice by M/V aquamarine within 0.5 mile of 51-23.2N 002-26.4E
  18. HYDROLANT 713/00 · Nav aids2000-02-25 → 2000-03-05
    Cable buoy with light temporarily established in 51-31.8N 001-55.4E
  19. HYDROLANT 704/00 · Cable ops2000-02-25 → 2000-02-25
    Cable operations in progress until further notice by cableship monarch within one mile of 51-31.9N 001-55.0E
  20. HYDROLANT 663/00 · Cable ops2000-02-22 → 2000-03-03
    Cable operations in progress until further notice by cableship monarch within one mile of 51-36.5N 001-57.2E

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