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 1389/16 · Nav aids2016-06-07 → 2016-06-09
    Dgps station at flamborough head light 54-07.0N 000-04.9W off air 0800Z to 1600Z daily 07 thru 09 jun
  2. HYDROLANT 1373/16 · Cable ops2016-06-05 → 2016-07-14
    Seismic survey in progress until further notice by M/V wg amundsen towing eight 5000 meter long cables in…
  3. HYDROLANT 1359/16 · Nav aids2016-06-03 → 2016-06-10
    RACON at meteorological mast 52-12.9N 002-30.1E unreliable
  4. HYDROLANT 1356/16 · Surveys2016-06-03 → 2016-06-07
    Survey operations in progress until further notice by M/V ivero vicinity of trackline between 51-19.8N…
  5. HYDROLANT 1353/16 · Nav aids2016-06-03 → 2016-07-15
    Mrcc aberdeen mf r/t and dsc service at greg ness 57-08N 002-03W off air
  6. HYDROLANT 1322/16 · Nav aids2016-05-31 → 2016-06-01
    Dgps station at girdle ness light 57-08.3N 002-02.8W off air 010800Z to 011600Z jun
  7. HYDROLANT 1319/16 · Other2016-05-31 → 2016-06-08
    Unexploded ordnance: a. 51-59.50N 001-59.74E
  8. HYDROLANT 1316/16 · Nav aids2016-05-31 → 2016-06-12
    Southern North Sea
  9. HYDROLANT 1304/16 · Nav aids2016-05-30 → 2016-07-11
    Fog signal at platform 12/21C jacky, 58-11.0N 002-58.8W inoperative
  10. HYDROLANT 1291/16 · Surveys2016-05-29 → 2016-06-17
    Underwater operations in progress until further notice by M/V meriel d vicinity of trackline between…
  11. HYDROLANT 1254/16 · Nav aids2016-05-26 → 2016-06-16
    Fairy w buoy 51-23.9N 002-09.3E unlit
  12. HYDROLANT 1247/16 · Surveys2016-05-26 → 2016-05-28
    Underwater operations in progress until further notice by M/V ivero vicinity of trackline between 51-18.8N…
  13. HYDROLANT 1221/16 · Surveys2016-05-23 → 2016-05-24
    Survey operations in progress until further notice by M/V ivero vicinity of trackline between 51-18.8N…
  14. HYDROLANT 1212/16 · Surveys2016-05-22 → 2016-05-23
    Underwater operations in progress until 290900Z may by M/V ivero vicinity of trackline between 51-20N…
  15. HYDROLANT 1205/16 · Other2016-05-21 → 2016-07-02
    All navigational aids at meteorological mast 53-53.1N 001-59.5E unreliable
  16. HYDROLANT 1197/16 · Nav aids2016-05-20 → 2016-05-26
    Buoys unlit: a. fairy w 51-23.9N 002-09.3E
  17. HYDROLANT 1195/16 · Nav aids2016-05-20 → 2016-05-20
    Fairy w buoy 51-23.9N 002-09.3E unlit
  18. HYDROLANT 1194/16 · Other2016-05-20 → 2016-06-17
    Unexploded ordnance: a. 52-09.93N 001-42.82E
  19. HYDROLANT 1156/16 · Cable ops2016-05-16 → 2016-05-17
    Underwater operations in progress until further notice by cableship ile d'aix vicinity 51-21.4N 001-33.5E
  20. HYDROLANT 1127/16 · Nav aids2016-05-11 → 2016-06-22
    Platform 48/12A, 53-32.8N 001-21.6E unlit and fog signal inoperative

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