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 1227/00 · Cable ops2000-04-07 → 2000-04-15
    Cable operations in progress until further notice by cableship monarch within one mile of 51-26N 002-34E
  2. HYDROLANT 1224/00 · Containers2000-04-07 → 2000-04-14
    Container adrift vicinity 53-24.5N 000-27.0E at 070830Z apr
  3. HYDROLANT 1217/00 · Containers2000-04-06 → 2000-04-13
    Two containers adrift in: a. 53-22N 001-46E
  4. HYDROLANT 1214/00 · Cable ops2000-04-06 → 2000-04-07
    Cable operations in progress until further notice by M/V mansal 18 vicinity 51-40N 002-38E
  5. HYDROLANT 1213/00 · Other2000-04-06 → 2000-04-12
    Pipelaying operations in progress until further notice by M/V northern pioneer and M/V cso apache vicinity…
  6. HYDROLANT 1211/00 · Nav aids2000-04-06 → 2000-04-06
    RACON at cromer light 52-56N 001-19E inoperative 060800Z to 060900Z apr
  7. HYDROLANT 1195/00 · Surveys2000-04-05 → 2000-04-07
    Underwater operations in progress until further notice by M/V toisa gryphon vicinity of trackline between…
  8. HYDROLANT 1193/00 · Other2000-04-05 → 2000-04-07
    Mpc buoy 51-06.2N 001-38.3E damaged
  9. HYDROLANT 1180/00 · Containers2000-04-04 → 2000-04-11
    Container adrift in 53-28N 001-51E at 041630Z apr
  10. HYDROLANT 1178/00 · Containers2000-04-04 → 2000-04-11
    Container adrift vicinity 53-34N 000-32E at 041130Z apr
  11. HYDROLANT 1174/00 · Containers2000-04-04 → 2000-04-11
    Ten containers adrift vicinity 54-04N 002-07E at 040400Z apr
  12. HYDROLANT 1168/00 · Nav aids2000-04-03 → 2000-04-28
    Ruytingen sw buoy 51-05N 001-47E missing
  13. HYDROLANT 1166/00 · Other2000-04-03 → 2002-10-11
    Manifold established in 57-21.8N 000-49.3E
  14. HYDROLANT 1155/00 · Other2000-04-03 → 2000-04-03
    Ruytingen sw buoy 51-05N 001-47E damaged and all navigational aids inoperative
  15. HYDROLANT 1141/00 · Cable ops2000-04-01 → 2000-04-04
    Cable operations in progress until further notice by M/V mansal 18 vicinity 51-40N 002-38E
  16. HYDROLANT 1131/00 · Surveys2000-03-31 → 2000-04-01
    Underwater operations in progress until further notice by M/V toisa gryphon vicinity of trackline between…
  17. HYDROLANT 1105/00 · Nav aids2000-03-29 → 2000-03-30
    Longstone light 55-39N 001-39W unreliable 0800Z to 1500Z daily 29 and 30 mar
  18. HYDROLANT 1074/00 · Nav aids2000-03-26 → 2000-03-27
    Red cable buoy established in 51-34.5N 002-54.8E
  19. HYDROLANT 1000/00 · Nav aids2000-03-20 → 2001-11-09
    Bell rock light 56-26N 002-23W range temporarily reducedto nine miles
  20. HYDROLANT 992/00 · Nav aids2000-03-20 → 2000-03-20
    RACON at bell rock light 56-26N 002-23W 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.