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 565/06 · Nav aids2006-03-21 → 2006-03-21
    Longstone light 55-38.6N 001-36.5W unreliable
  2. HYDROLANT 524/06 · Cable ops2006-03-16 → 2006-03-24
    Underwater operations in progress until further notice by cableship il de brehat vicinity 51-07.95N 001-56.14E
  3. HYDROLANT 519/06 · Other2006-03-15 → 2006-03-16
    Navigation prohibited until further notice within 500 meters of: a. 60-22.94N 004-05.91W
  4. HYDROLANT 512/06 · Nav aids2006-03-15 → 2006-03-15
    Stirling dgps station 56-04.3N 004-03.6W off air
  5. HYDROLANT 502/06 · Other2006-03-13 → 2006-03-15
    Stirling dpgs station 56-04.3N 004-03.6W at reduced power
  6. HYDROLANT 501/06 · Other2006-03-13 → 2006-03-13
    Earl hill dpgs station 56-04.2N 004-03.6W at reduced power
  7. HYDROLANT 486/06 · Cable ops2006-03-11 → 2006-03-16
    Underwater operations in progress until further notice by cableship ile de brehat vicinity 51-15.1N 002-18.8E
  8. HYDROLANT 483/06 · Other2006-03-11 → 2006-04-20
    Unexploded ordnance in 54-03.41N 000-41.64E
  9. HYDROLANT 460/06 · Other2006-03-08 → 2006-04-19
    Unexploded ordnance 52-06.85N 002-28.14E
  10. HYDROLANT 435/06 · Nav aids2006-03-02 → 2006-08-16
    Fog signal at stone light buoy 51-26N 001-43E permanently discontinued
  11. HYDROLANT 421/06 · Surveys2006-03-01 → 2006-03-10
    Underwater operations in progress until further notice by M/V grey mammoth vicinity 52-37.6N 001-46.0E
  12. HYDROLANT 413/06 · Nav aids2006-02-28 → 2006-09-20
    Cromarty light 57-41.0N 004-02.1W discontinued
  13. HYDROLANT 407/06 · Nav aids2006-02-27 → 2006-05-15
    Humber lightfloat 53-39N 000-20E missing
  14. HYDROLANT 371/06 · Nav aids2006-02-22 → 2006-03-04
    Ruytingen west buoy 51-07N 001-50E missing
  15. HYDROLANT 361/06 · Nav aids2006-02-21 → 2006-02-22
    Ruytingen west buoy 51-07N 001-51E off station
  16. HYDROLANT 355/06 · Other2006-02-19 → 2006-02-24
    Bombing exercises 1100Z to 1200Z daily 20 thru 24 feb in area bound by 52-36N 002-20E, 52-26N 002-25E 52-20N…
  17. HYDROLANT 323/06 · Nav aids2006-02-16 → 2006-02-16
    Sumburgh head light 59-51.3N 001-16.3W unreliable
  18. HYDROLANT 295/06 · Nav aids2006-02-13 → 2006-02-13
    Fog signal at dowsing platform "B1D" 53-33.7N 000-52.7E inoperative
  19. HYDROLANT 287/06 · Nav aids2006-02-11 → 2006-02-12
    Sumburgh head light 59-51.2N 001-16.5W unlit
  20. HYDROLANT 283/06 · Nav aids2006-02-11 → 2006-02-21
    Outer skerry light 60-33.0N 001-18.3W unreliable

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