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 231/99 · Nav aids1999-02-02 → 1999-02-02
    Dgps service at sumburgh head light 59-51N 001-16W off air 021000Z to 021400Z feb
  2. HYDROLANT 224/99 · Nav aids1999-02-01 → 1999-02-12
    Bergues buoy 51-17N 002-19E unlit
  3. HYDROLANT 223/99 · Nav aids1999-02-01 → 1999-02-02
    Orford ness light 52-05N 001-35E unlit
  4. HYDROLANT 209/99 · Other1999-01-31 → 1999-03-19
    One person reported overboard from M/V dana hafnia
  5. HYDROLANT 187/99 · Nav aids1999-01-28 → 1999-01-29
    Start point light 59-17N 002-22W unlit
  6. HYDROLANT 181/99 · Cable ops1999-01-27 → 1999-02-01
    Underwater operations in progress until further notice by cableship skagerrak along trackline joining 52-34N…
  7. HYDROLANT 159/99 · Cable ops1999-01-25 → 1999-01-26
    Cable operations in progress until further notice by M/V iris between 59-25N 000-12E and 59-32N 000-21W
  8. HYDROLANT 155/99 · Cable ops1999-01-24 → 1999-01-29
    Cable operations in progress until further notice by cableship adams challenger between 52-28N 002-14E and…
  9. HYDROLANT 154/99 · Cable ops1999-01-24 → 1999-02-02
    Cable operations in progress until further notice by cableship cable installer between 51-35N 002-58E and…
  10. HYDROLANT 145/99 · Nav aids1999-01-23 → 1999-01-24
    Northeast goodwin buoy 51-20N 001-34E unlit
  11. HYDROLANT 137/99 · Cable ops1999-01-22 → 1999-01-24
    Cable operations in progress until further notice by cableship adams challenger between 52-25N 002-10E and…
  12. HYDROLANT 106/99 · Nav aids1999-01-18 → 1999-01-21
    NSR-R2 platform 53-56N 002-51E unlit and fog signal inoperative
  13. HYDROLANT 99/99 · Nav aids1999-01-16 → 1999-01-17
    South shipwash buoy 51-52.7N 001-34.0E unlit
  14. HYDROLANT 84/99 · Cable ops1999-01-14 → 1999-01-22
    Underwater cable operations in progress until further notice by cableship adams challenger between 52-27N…
  15. HYDROLANT 35/99 · Cable ops1999-01-07 → 1999-01-27
    Underwater cable operations in progress until further notice by cableship skagerrak along trackline joining…
  16. HYDROLANT 24/99 · Nav aids1999-01-06 → 1999-01-21
    Ruytingen west buoy 51-07N 001-51E off station
  17. HYDROLANT 2471/98 · Nav aids1998-12-27 → 1999-01-12
    Fog signal at pentland skerries light 58-41N 002-55W unreliable
  18. HYDROLANT 2443/98 · Nav aids1998-12-21 → 1999-01-01
    Deepwater route buoy 53-13.6N 002-48.8E unlit
  19. HYDROLANT 2439/98 · Nav aids1998-12-21 → 1999-04-02
    South race buoy relocated to 53-07.79N 000-57.45E
  20. HYDROLANT 2319/98 · Wrecks1998-12-02 → 1999-02-26
    Wreck, swept depth 30 meters, vicinity 51-13-53N 001-42-16E

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