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 1786/16 · Other2016-07-15 → 2016-08-26
    Unexploded ordnance: a. in 51-59.50N 001-59.74E
  2. HYDROLANT 1782/16 · Nav aids2016-07-15 → 2016-08-23
    Mrcc aberdeen mf r/t and dsc service at greg ness 57-08N 002-03W off air
  3. HYDROLANT 1767/16 · Nav aids2016-07-13 → 2016-07-20
    Orkney Islands
  4. HYDROLANT 1749/16 · Nav aids2016-07-11 → 2016-08-22
    Fog signal at platform 12/21C jacky, 58-11.0N 002-58.8W inoperative
  5. HYDROLANT 1738/16 · Surveys2016-07-11 → 2016-07-16
    Underwater operations in progress until further notice by M/V ile de aix and M/V trya vicinity 51-21.38N…
  6. HYDROLANT 1735/16 · Cable ops2016-07-10 → 2016-08-11
    Seismic survey in progress until further notice by M/V ramform sterling towing 12 8000 meter long cables in…
  7. HYDROLANT 1725/16 · Surveys2016-07-08 → 2016-08-15
    Survey operations in progress until further notice by M/V bibby tethra towing equipment in area bound by…
  8. HYDROLANT 1721/16 · Surveys2016-07-08 → 2016-07-11
    Underwater operations in progress until further notice by M/V trya vicinity 51-21.38N 001-33.68E
  9. HYDROLANT 1692/16 · Nav aids2016-07-05 → 2016-09-27
    Wind turbine E17, 51-24.4N 001-40.8E unlit and fog signal unreliable
  10. HYDROLANT 1680/16 · Cable ops2016-07-04 → 2016-08-12
    Pipelaying operations in progress until further notice by cableship apache II vicinity of trackline between…
  11. HYDROLANT 1670/16 · Other2016-07-02 → 2016-07-03
    All navigational aids at meteorological mast 53-53.1N 001-59.5E unreliable
  12. HYDROLANT 1648/16 · Other2016-06-30 → 2017-01-27
    Navigation prohibited within 500 meters of 56-46.21N 000-42.78E
  13. HYDROLANT 1645/16 · Nav aids2016-06-30 → 2016-07-20
    RACON at meteorological mast 52-12.9N 002-30.1E unreliable
  14. HYDROLANT 1625/16 · Other2016-06-28 → 2017-01-27
    Navigation prohibited within 500 meters of 57-40.14N 000-25.30E
  15. HYDROLANT 1619/16 · Other2016-06-27 → 2016-08-08
    Unexploded ordnance vicinity of trackline joining 52-07.22N 001-45.12E, 52-05.59N 001-47.26E, 52-03.77N…
  16. HYDROLANT 1614/16 · Nav aids2016-06-27 → 2016-06-28
    Rose ness light 58-52.3N 002-49.9W unreliable
  17. HYDROLANT 1599/16 · Surveys2016-06-25 → 2016-06-25
    Survey operations in progress until further notice by M/V ivero vicinity of trackline between 51-22.2N…
  18. HYDROLANT 1594/16 · Surveys2016-06-24 → 2016-06-24
    Survey operations in progress until further notice by M/V ivero vicinity of trackline between 51-22.2N…
  19. HYDROLANT 1578/16 · Other2016-06-22 → 2016-08-03
    Unexploded ordnance: a. 52-09.93N 001-42.82E
  20. HYDROLANT 1556/16 · Surveys2016-06-21 → 2016-06-22
    Underwater operations in progress until further notice by M/V deep helder vicinity of trackline between…

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