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 3162/01 · Nav aids2001-12-12 → 2001-12-19
    NSR-R2 light 53-56N 002-51E and NSR-R5 light 53-42N 002-09E unlit
  2. HYDROLANT 3146/01 · Cable ops2001-12-11 → 2001-12-16
    Seismic survey in progress until further notice by M/V geo surveyor towing 1500 meter long cable within…
  3. HYDROLANT 3109/01 · Cable ops2001-12-07 → 2001-12-11
    Underwater operations in progress until further notice by cableship monarch vicinity 51-20.9N 002-29.5E
  4. HYDROLANT 3103/01 · Nav aids2001-12-07 → 2001-12-07
    Ruytingen west buoy 51-07N 001-51E unlit
  5. HYDROLANT 3032/01 · Surveys2001-11-27 → 2001-11-29
    Underwater operations in progress until further notice by vessel aquamarine vicinity 52-59.9N 002-41.0E
  6. HYDROLANT 3008/01 · Cable ops2001-11-24 → 2001-11-25
    Underwater operations in progress until further notice by cableship monarch within 2.5 miles of 51-27.5N…
  7. HYDROLANT 2982/01 · Nav aids2001-11-21 → 2001-12-12
    NSR-R4 light 53-30N 002-31E unlit
  8. HYDROLANT 2975/01 · Nav aids2001-11-20 → 2001-12-12
    NSR-R1 light 53-56N 002-24E unlit
  9. HYDROLANT 2964/01 · Cable ops2001-11-19 → 2001-11-20
    Underwater operations in progress until further notice by cableship monarch vicinity 51-28N 002-41E
  10. HYDROLANT 2954/01 · Debris2001-11-17 → 2001-11-24
    Fishing nets and equipment marked by buoy adrift in 55-12.4N 000-52.5W
  11. HYDROLANT 2944/01 · Cable ops2001-11-15 → 2001-11-16
    Underwater operations in progress until further notice by cableship monarch vicinity 51-28N 002-41E
  12. HYDROLANT 2916/01 · Wrecks2001-11-12 → 2003-01-04
    Shoals reported in tss: a. 27.6 meters in 51-06.7N 001-43.3E
  13. HYDROLANT 2863/01 · Nav aids2001-11-07 → 2001-11-07
    Clyth ness light 58-18.6N 003-12.7W unreliable
  14. HYDROLANT 2836/01 · Nav aids2001-11-03 → 2001-11-03
    RACON at inner dowsing lightfloat 53-20N 000-34E unreliable 030800Z to 031600Z nov
  15. HYDROLANT 2826/01 · Cable ops2001-11-01 → 2001-11-06
    Underwater operations in progress until further notice by cableship monarch vicinity 51-28N 002-41E
  16. HYDROLANT 2791/01 · Nav aids2001-10-29 → 2001-11-01
    DR1 buoy 53-04N 002-40E unlit
  17. HYDROLANT 2781/01 · Cable ops2001-10-28 → 2001-10-29
    Underwater operations in progress until further notice by cableship monarch vicinity 51-29N 002-41E
  18. HYDROLANT 2777/01 · Cable ops2001-10-27 → 2001-10-28
    Underwater operations in progress until further notice by cableship monarch vicinity 51-25N 002-34E
  19. HYDROLANT 2756/01 · Nav aids2001-10-25 → 2001-10-27
    CS4 buoy 51-08N 001-34E damaged and unlit
  20. HYDROLANT 2746/01 · Nav aids2001-10-24 → 2001-10-24
    North foreland light 51-22N 001-27E unreliable 240800Z to 241500Z oct

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