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 876/01 · Nav aids2001-03-16 → 2001-03-19
    Ruytingen sw buoy 51-05N 001-47E unlit and fog signal inoperative
  2. HYDROLANT 866/01 · Other2001-03-15 → 2001-03-17
    Kinnaird head light 57-42N 002-00W at reduced intensity
  3. HYDROLANT 856/01 · Surveys2001-03-14 → 2001-03-16
    Underwater operations in progress until further notice by M/V monarch vicinity 51-11N 002-01E
  4. HYDROLANT 850/01 · Cable ops2001-03-14 → 2001-03-17
    Underwater operations in progress until further notice by cableship peter faber vicinity 54-38N 000-59W
  5. HYDROLANT 817/01 · Surveys2001-03-11 → 2001-03-14
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  6. HYDROLANT 799/01 · Surveys2001-03-10 → 2001-03-11
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  7. HYDROLANT 788/01 · Nav aids2001-03-08 → 2001-03-13
    Platform NSR-R3 53-38.4N 002-56.7E light and fog signal unreliable
  8. HYDROLANT 784/01 · Cable ops2001-03-08 → 2001-03-09
    Underwater operations in progress until further notice by cableship monarch vicinity 51-11N 002-01E
  9. HYDROLANT 777/01 · Cable ops2001-03-07 → 2001-03-12
    Underwater operations in progress until further notice by cableship ocean challenger vicinity of trackline…
  10. HYDROLANT 774/01 · Surveys2001-03-07 → 2001-03-10
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  11. HYDROLANT 763/01 · Surveys2001-03-07 → 2001-03-07
    Underwater operations in progress until further notice by M/V maersk forwarder vicinity of trackline between…
  12. HYDROLANT 733/01 · Surveys2001-03-04 → 2001-03-07
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  13. HYDROLANT 716/01 · Other2001-03-02 → 2001-03-07
    St
  14. HYDROLANT 711/01 · Surveys2001-03-02 → 2001-03-04
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  15. HYDROLANT 704/01 · Nav aids2001-03-01 → 2001-03-02
    Hoy sound hight light 58-56N 003-16W unlit
  16. HYDROLANT 692/01 · Surveys2001-02-28 → 2001-03-02
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  17. HYDROLANT 672/01 · Surveys2001-02-25 → 2001-02-27
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  18. HYDROLANT 663/01 · Surveys2001-02-24 → 2001-08-13
    Hydrogaphic survey in progress until further notice by M/V marine explorer towing equipment in area bound by…
  19. HYDROLANT 649/01 · Surveys2001-02-23 → 2001-02-25
    Underwater operations in progress until further notice by M/V kommandor jack vicinity of trackline joining…
  20. HYDROLANT 624/01 · Cable ops2001-02-21 → 2001-03-06
    Underwater operations in progress until further notice by cableship ocean challenger vicinity of trackline…

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