North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
6
since 1997
4,730
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%
Other66814%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,729 cancelled

  1. HYDROLANT 2582/14 · Nav aids2014-10-24 → 2014-11-07
    Fog signal at wind turbine 51-44.13N 001-56.56E unreliable
  2. HYDROLANT 2538/14 · Other2014-10-18 → 2014-11-29
    Fog signal at race bank offshore wind farm meteorological mast 53-18.8N 000-44.9E inoperative
  3. HYDROLANT 2520/14 · Nav aids2014-10-16 → 2014-10-17
    Kinnairds head light 57-41.9N 002-00.1W unreliable
  4. HYDROLANT 2517/14 · Cable ops2014-10-16 → 2014-11-02
    Seismic survey in progress until further notice by M/V western trident towing 12 four mile long cables in…
  5. HYDROLANT 2514/14 · Nav aids2014-10-16 → 2014-10-22
    All navigational aids at platform horne and wren 52-54.3N 002-35.9E inoperative
  6. HYDROLANT 2502/14 · Nav aids2014-10-14 → 2014-11-25
    Ruytingen sw buoy 51-04.3N 001-45.8E off station
  7. HYDROLANT 2499/14 · Nav aids2014-10-14 → 2014-10-14
    Dgps station at flamborough head light 54-07.0N 000-04.8W unreliable
  8. HYDROLANT 2469/14 · Surveys2014-10-11 → 2014-10-31
    Underwater operations in progress until further notice by M/V stril explorer with submersible in area bound…
  9. HYDROLANT 2439/14 · Nav aids2014-10-08 → 2014-11-19
    Humber lightfloat 53-39.1N 000-20.0E missing
  10. HYDROLANT 2438/14 · Nav aids2014-10-08 → 2014-10-08
    Skroo light 59-33.2N 001-36.5W unreliable
  11. HYDROLANT 2429/14 · Nav aids2014-10-07 → 2014-10-08
    Humber lightfloat 53-39.1N 000-20.0E off station
  12. HYDROLANT 2422/14 · Nav aids2014-10-07 → 2014-10-07
    East goodwin lightfloat 51-13.0N 001-36.3E light unreliable
  13. HYDROLANT 2417/14 · Nav aids2014-10-06 → 2014-10-10
    All navigational aids at platform buchan alpha 57-54.2N 000-01.9E unreliable
  14. HYDROLANT 2408/14 · Nav aids2014-10-05 → 2014-10-06
    Platform 21/10-FA 57-43.9N 000-58.4E unlit
  15. HYDROLANT 2339/14 · Nav aids2014-09-28 → 2014-09-28
    Southern North Sea
  16. HYDROLANT 2327/14 · Surveys2014-09-26 → 2014-09-27
    Survey operations in progress until further notice by M/V geo prospector within one mile of 53-40.0N 000-54.5E
  17. HYDROLANT 2315/14 · Surveys2014-09-25 → 2014-10-01
    Underwater operations in pogress until further notice by M/V constructor with submersible vicinity 53-00.55N…
  18. HYDROLANT 2291/14 · Other2014-09-23 → 2014-10-25
    B. 49/17-DD, 53-26.4N 002-23.6E
  19. HYDROLANT 2273/14 · Cable ops2014-09-19 → 2014-10-04
    Underwater operations in progress until further notice by cableship ile de aix vicinity of trackline between…
  20. HYDROLANT 2268/14 · Cable ops2014-09-19 → 2014-09-30
    Underwater operations in progress until further notice by cableship raymond croze with submersible within…

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