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 2883/12 · Nav aids2012-12-06 → 2012-12-06
    Scotland-east Coast
  2. HYDROLANT 2875/12 · Nav aids2012-12-05 → 2012-12-15
    Cancel HYDROLANT 2488/12
  3. HYDROLANT 2862/12 · Nav aids2012-12-04 → 2012-12-05
    Orkney Islands
  4. HYDROLANT 2845/12 · Nav aids2012-12-02 → 2013-02-05
    Cancel HYDROLANT 2835/12(24)
  5. HYDROLANT 2839/12 · Nav aids2012-12-01 → 2015-04-02
    Cancel HYDROLANT 2824/12(35), aid restored
  6. HYDROLANT 2833/12 · Nav aids2012-12-01 → 2012-12-04
    Southern North Sea
  7. HYDROLANT 2824/12 · Nav aids2012-11-30 → 2012-12-01
    Cancel HYDROLANT 2821/12
  8. HYDROLANT 2821/12 · Nav aids2012-11-30 → 2012-11-30
    Pentland Firth
  9. HYDROLANT 2806/12 · Nav aids2012-11-28 → 2012-12-27
    Southern North Sea
  10. HYDROLANT 2803/12 · Cable ops2012-11-28 → 2012-11-29
    526 meter long pipeline adrift vicinity of trackline between 52-33N 003-25E and 51-33N 002-04E
  11. HYDROLANT 2766/12 · Cable ops2012-11-23 → 2012-12-01
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 51-52.9N 002-28.8E
  12. HYDROLANT 2745/12 · Nav aids2012-11-20 → 2012-11-20
    Mrcc aberdeen mf dsc and r/t service at greg ness 57-08N 002-03W inoperative
  13. HYDROLANT 2731/12 · Nav aids2012-11-18 → 2012-11-20
    Scotland-north Coast
  14. HYDROLANT 2712/12 · Nav aids2012-11-17 → 2013-02-16
    Cancel HYDROLANT 2666/12
  15. HYDROLANT 2666/12 · Nav aids2012-11-10 → 2012-11-17
    Cancel HYDROLANT 2487/12
  16. HYDROLANT 2657/12 · Nav aids2012-11-09 → 2012-11-10
    Cancel HYDROLANT 2635/12(35), aid restored
  17. HYDROLANT 2651/12 · Surveys2012-11-09 → 2012-11-09
    Underwater operations in progress until further notice by M/V geoholm with submersible vicinity 51-51.4N…
  18. HYDROLANT 2637/12 · Nav aids2012-11-08 → 2012-11-08
    Southern North Sea
  19. HYDROLANT 2635/12 · Nav aids2012-11-07 → 2012-11-09
    Pentland Firth
  20. HYDROLANT 2631/12 · Surveys2012-11-07 → 2012-11-08
    Underwater operations in progress until further notice by M/V geoholm with submersible 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.