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 195/02 · Nav aids2002-01-27 → 2002-01-27
    Start point light 59-16.7N 002-22.5W unreliable
  2. HYDROLANT 175/02 · Nav aids2002-01-24 → 2002-01-25
    Saint abbs head light 55-55N 002-08W unreliable
  3. HYDROLANT 152/02 · Nav aids2002-01-22 → 2002-01-25
    DR1 buoy 53-04N 002-40E unlit
  4. HYDROLANT 147/02 · Nav aids2002-01-20 → 2002-01-22
    Auskerry light 59-02N 002-34W unreliable
  5. HYDROLANT 114/02 · Nav aids2002-01-16 → 2002-01-16
    Coquet island light 55-20N 001-32W unreliable until 161600Z jan
  6. HYDROLANT 111/02 · Nav aids2002-01-16 → 2002-03-02
    Ruytingen west buoy 51-07.0N 001-50.5E unlit
  7. HYDROLANT 91/02 · Nav aids2002-01-13 → 2002-01-14
    Bell rock light 56-26N 002-23W unlit
  8. HYDROLANT 33/02 · Nav aids2002-01-06 → 2002-01-08
    Fog signal at F3 lightvessel 51-24N 002-01E unreliable
  9. HYDROLANT 32/02 · Nav aids2002-01-06 → 2002-01-06
    F3 lightvessel 51-24N 002-01E unlit and fog signal unreliable
  10. HYDROLANT 14/02 · Nav aids2002-01-03 → 2002-01-05
    Out skerries light 60-25.5N 000-43.7W unreliable
  11. HYDROLANT 3295/01 · Cable ops2001-12-29 → 2002-01-11
    Seismic survey in progress until further notice by M/V geo surveyor within two miles of 53-10N 002-52E
  12. HYDROLANT 3288/01 · Other2001-12-28 → 2001-12-29
    Isle of may light 56-11N 002-33W at reduced intensity
  13. HYDROLANT 3275/01 · Other2001-12-25 → 2002-01-01
    Three ton submersible adrift vicinity 57-56.3N 001-51.5E at 251525Z dec
  14. HYDROLANT 3274/01 · Nav aids2001-12-25 → 2001-12-28
    Brough head light 59-08.2N 003-20.3E unlit
  15. HYDROLANT 3271/01 · Other2001-12-24 → 2002-01-03
    Hoy sound rear leading light 58-56N 003-16W at reduced intensity
  16. HYDROLANT 3218/01 · Nav aids2001-12-20 → 2001-12-21
    Mrsc shetland 60-09N 001-08W mf dsc inoperative
  17. HYDROLANT 3213/01 · Nav aids2001-12-19 → 2002-03-08
    NSR-R2 light 53-56N 002-51E unlit
  18. HYDROLANT 3200/01 · Cable ops2001-12-17 → 2001-12-24
    Seismic survey in progress until further notice by M/V geo surveyor within two miles of 53-10.1N 002-52.0E
  19. HYDROLANT 3182/01 · Nav aids2001-12-15 → 2001-12-20
    Rce buoy 51-02N 001-53E unlit
  20. HYDROLANT 3179/01 · Derelicts2001-12-15 → 2001-12-15
    Derelict vessel on fire and adrift in 55-24N 001-18W at 150040Z dec

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