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 843/16 · Other2016-04-09 → 2016-05-21
    All navigational aids at meteorological mast 53-53.1N 001-59.5E unreliable
  2. HYDROLANT 787/16 · Cable ops2016-04-01 → 2016-04-05
    Underwater operations in progress until further notice by cableship pierre de fermat with submersible in…
  3. HYDROLANT 778/16 · Other2016-04-01 → 2017-01-27
    Navigation prohibited within 500 meters of 57-42.94N 001-21.02E
  4. HYDROLANT 768/16 · Nav aids2016-03-31 → 2016-04-01
    Black deep buoy 1 51-44.0N 001-28.1E unlit
  5. HYDROLANT 757/16 · Nav aids2016-03-29 → 2016-06-20
    Hinder 1 buoy 51-20.8N 002-11.0E off station
  6. HYDROLANT 750/16 · Other2016-03-29 → 2017-01-27
    Navigation prohibited within 500 meters of: a. 57-04.74N 002-04.91E
  7. HYDROLANT 725/16 · Cable ops2016-03-26 → 2016-03-31
    Underwater operations in progress until further notice by cableship ile d'aix vicinity 54-15.6N 000-01.4E
  8. HYDROLANT 713/16 · Nav aids2016-03-24 → 2016-03-25
    Mrcc shetland dsc and r/t services at saxavord 60-50N 000-50W off air
  9. HYDROLANT 703/16 · Nav aids2016-03-23 → 2016-03-23
    Moul of eswick light 60-15.7N 001-05.9W unlit
  10. HYDROLANT 684/16 · Nav aids2016-03-21 → 2016-03-21
    Trinity buoy 51-49.0N 001-36.4E unlit
  11. HYDROLANT 660/16 · Other2016-03-18 → 2016-03-18
    Auskerry light 59-01.5N 002-34.3W ureliable
  12. HYDROLANT 652/16 · Nav aids2016-03-17 → 2016-03-18
    Auskerry light 59-01.5N 002-34.3W unlit
  13. HYDROLANT 607/16 · Surveys2016-03-13 → 2016-04-09
    Underwater operations in progress until further notice by barge taklift 4 in 53-00.5N 002-40.0E
  14. HYDROLANT 606/16 · Nav aids2016-03-13 → 2016-03-15
    Dgps station at sumburgh head light 59-51.2N 001-16.5W off air 131000Z to 151700Z mar
  15. HYDROLANT 599/16 · Cable ops2016-03-12 → 2016-04-26
    Seismic survey in progress until further notice by M/V ramform vanguard towing ten 8000 meter long cables in…
  16. HYDROLANT 566/16 · Nav aids2016-03-09 → 2016-03-21
    All navigation aids at platform 49/17-CD, 53-25.4N 002-22.5E inoperative
  17. HYDROLANT 558/16 · Cable ops2016-03-08 → 2016-03-09
    Underwater operations in progress until further notice by cableship pierre de fermat along trackline between…
  18. HYDROLANT 532/16 · Nav aids2016-03-03 → 2016-03-16
    Platform shamrock, 53-28.2N 002-55.3E unlit
  19. HYDROLANT 522/16 · Nav aids2016-03-02 → 2016-03-02
    Sunk centre lightfloat 51-50.1N 001-46.0E unreliable
  20. HYDROLANT 508/16 · Nav aids2016-03-01 → 2016-04-11
    Wind turbine b, 58-05.8N 003-04.3W unlit

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