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 652/00 · Cable ops2000-02-21 → 2000-02-26
    Cable operations in progress until further notice by M/V aquamarine within one-half mile of 51-23.2N 002-30.7E
  2. HYDROLANT 651/00 · Other2000-02-21 → 2000-04-03
    Pipelaying operations in progress until further notice by M/V apache and M/V northern prince along trackline…
  3. HYDROLANT 624/00 · Cable ops2000-02-19 → 2000-02-21
    Underwater operations in progress until further notice by cableship monarch within one mile of 51-04.8N…
  4. HYDROLANT 623/00 · Surveys2000-02-19 → 2000-03-03
    Underwater operations in progress until further notice by M/V aquamarine vicinity 51-22.4N 001-42.6E
  5. HYDROLANT 605/00 · Nav aids2000-02-17 → 2000-02-20
    Bell rock light 56-26N 002-23W unlit
  6. HYDROLANT 579/00 · Surveys2000-02-15 → 2000-02-27
    Underwater operations in progress until further notice by M/V goosander vicinity 51-21.4N 001-32.9E
  7. HYDROLANT 578/00 · Surveys2000-02-15 → 2000-02-19
    Underwater operations in progress until further notice by M/V aquamarine vicinity 51-20.6N 001-50.0E
  8. HYDROLANT 566/00 · Nav aids2000-02-14 → 2000-02-19
    Lighted buoy temporarily established in 51-04.8N 001-53.0E
  9. HYDROLANT 565/00 · Surveys2000-02-14 → 2000-02-15
    Underwater operations in progress until further notice by M/V aquamarine vicinity 51-20.1N 001-58.5E
  10. HYDROLANT 528/00 · Cable ops2000-02-11 → 2000-02-12
    Underwater operations in progress until further notice by cableship monarch within one mile of 51-04N 001-53E
  11. HYDROLANT 484/00 · Nav aids2000-02-08 → 2000-02-09
    Out skerries light 60-25.5N 000-43.5W unreliable
  12. HYDROLANT 434/00 · Nav aids2000-02-04 → 2000-02-17
    Bell rock light 56-26N 002-23W unreliable
  13. HYDROLANT 432/00 · Nav aids2000-02-04 → 2000-02-08
    Orfordness light 52-05N 001-35E red and green sectors unreliable
  14. HYDROLANT 416/00 · Nav aids2000-02-03 → 2000-02-03
    Gregness mf dsc station 57-08N 002-03W inoperative
  15. HYDROLANT 332/00 · Nav aids2000-01-29 → 2000-01-30
    North haisbro buoy 53-00N 001-32E unlit
  16. HYDROLANT 296/00 · Surveys2000-01-26 → 2000-01-28
    Underwater operations in progress until further notice by M/V brodospas star between 52-29N 003-11E and…
  17. HYDROLANT 277/00 · Surveys2000-01-25 → 2000-01-26
    Underwater operations in progress until further notice by M/V brodospas star between 52-29N 002-50E and…
  18. HYDROLANT 275/00 · Other2000-01-25 → 2000-01-26
    Fairy south buoy 51-21N 002-17E unreliable
  19. HYDROLANT 274/00 · Nav aids2000-01-25 → 2000-01-25
    Elbow buoy 51-23N 001-32E unlit
  20. HYDROLANT 257/00 · Cable ops2000-01-24 → 2000-01-28
    Cable operations in progress until further notice by M/V goosander vicinity 51-21.4N 001-32.9E

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