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 374/05 · Containers2005-02-23 → 2005-03-02
    Container adrift vicinity 52-20.7N 002-22.6E at 231703Z feb
  2. HYDROLANT 373/05 · Containers2005-02-23 → 2005-02-23
    Container adrift vicinity 52-15.3N 002-23.1E at 231149Z feb
  3. HYDROLANT 371/05 · Containers2005-02-23 → 2005-03-02
    Container adrift in 52-24.7N 002-29.4E at 230705Z feb
  4. HYDROLANT 369/05 · Containers2005-02-23 → 2005-03-02
    Two containers adrift in 52-28.8N 002-38.3E at 222008Z feb
  5. HYDROLANT 304/05 · Nav aids2005-02-14 → 2005-02-16
    Dgps station at flamborough head light 54-07.0N 000-04.8W unreliable
  6. HYDROLANT 272/05 · Nav aids2005-02-08 → 2005-02-10
    Oxford ness light fixed red sector 52-05N 001-35E unlit
  7. HYDROLANT 194/05 · Nav aids2005-01-25 → 2005-02-24
    Sumburgh head light 59-51.2N 001-16.5W dgps service temporarily discontinued
  8. HYDROLANT 189/05 · Containers2005-01-24 → 2005-01-31
    Three 20 foot containers reported adrift in 53-32.6N 000-23.0E at 241400Z jan 05
  9. HYDROLANT 187/05 · Containers2005-01-24 → 2005-01-30
    Six 40 foot containers adrift 53-51.8N 002-44.1E at 240115Z
  10. HYDROLANT 184/05 · Nav aids2005-01-23 → 2005-12-08
    Fairy s buoy 51-21.2N 002-17.3E missing
  11. HYDROLANT 161/05 · Nav aids2005-01-20 → 2005-01-20
    Dgps station at girdle ness light 57-08.3N 002-02.8W unreliable 200900Z to 201700Z jan
  12. HYDROLANT 126/05 · Wrecks2005-01-17 → 2005-02-28
    HYDROLANT 126/05
  13. HYDROLANT 120/05 · Nav aids2005-01-17 → 2005-01-17
    Stirling dgps station 56-04N 004-04W unreliable 171200Z to 171700Z jan
  14. HYDROLANT 107/05 · Cable ops2005-01-15 → 2005-01-26
    Cable operations in progress until further notice by cableship wave sentinel vicinity 52-28N 002-52E
  15. HYDROLANT 102/05 · Other2005-01-14 → 2005-01-16
    Cantick head light 58-47N 003-08W at reduced intensity
  16. HYDROLANT 84/05 · Nav aids2005-01-13 → 2005-01-13
    Cantick head light 58-47N 003-08W unlit
  17. HYDROLANT 82/05 · Nav aids2005-01-12 → 2005-01-13
    Cantick head light 58-47N 003-08W unreliable
  18. HYDROLANT 74/05 · Nav aids2005-01-11 → 2005-11-02
    Ruytingen sw lightbuoy 51-05N 001-47E missing
  19. HYDROLANT 39/05 · Nav aids2005-01-05 → 2005-01-06
    Sumburgh head light 59-51.3N 001-16.3W unlit
  20. HYDROLANT 30/05 · Nav aids2005-01-05 → 2005-01-25
    Dgps station at sumburgh head light 59-51.3N 001-16.3W inoperative

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