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 481/16 · Nav aids2016-02-26 → 2016-02-28
    Dgps station at girdle ness light 57-08.3N 002-02.8W off air 261000Z to 281700Z feb
  2. HYDROLANT 450/16 · Nav aids2016-02-22 → 2016-02-27
    Dgps station at girdle ness light 57-08.3N 002-02.8W off air 221000Z to 271700Z feb
  3. HYDROLANT 449/16 · Nav aids2016-02-22 → 2016-02-22
    Dgps station at girdle ness light 57-08.3N 002-02.8W off air 221000Z to 221700Z feb
  4. HYDROLANT 424/16 · Nav aids2016-02-19 → 2016-03-01
    Platform tethys 53-39.1N 002-03.5E unlit and fog signal inoperative
  5. HYDROLANT 404/16 · Other2016-02-17 → 2016-03-01
    All navigational aids at platforms within 7.5 miles of 53-27N 002-20E unreliable
  6. HYDROLANT 396/16 · Nav aids2016-02-16 → 2016-02-17
    All navigational aids at platforms unreliable: a. 49/16-ED, 53-26.0N 002-09.3E
  7. HYDROLANT 387/16 · Other2016-02-15 → 2016-02-16
    All navigational aids at platforms unreliable: a. 49/17-LD, 53-28.5N 002-13.9E
  8. HYDROLANT 382/16 · Nav aids2016-02-15 → 2016-03-29
    Hinder 1 buoy 51-20.8N 002-11.0E off station
  9. HYDROLANT 381/16 · Nav aids2016-02-15 → 2016-02-16
    Foxtrot 3 lightship 51-23.8N 002-00.6E light unreliable
  10. HYDROLANT 374/16 · Nav aids2016-02-13 → 2016-02-14
    Stirling dgps station 56-04N 004-04W unreliable
  11. HYDROLANT 369/16 · Nav aids2016-02-12 → 2016-04-12
    All navigational aids unreliable at turbines: a. A1, 51-26.47N 001-34.64E
  12. HYDROLANT 343/16 · Nav aids2016-02-09 → 2016-02-09
    Sumburgh head light 59-51.2N 001-16.5W unreliable
  13. HYDROLANT 315/16 · Nav aids2016-02-04 → 2016-02-04
    Ne cross sand buoy 52-44.2N 001-53.8E unlit
  14. HYDROLANT 307/16 · Nav aids2016-02-03 → 2016-02-04
    Auskerry light 59-01.5N 002-34.3W unreliable
  15. HYDROLANT 288/16 · Nav aids2016-02-02 → 2016-02-06
    All navigational aids at platform 49/9B, 53-49.9N 002-46.3E inoperative
  16. HYDROLANT 278/16 · Nav aids2016-01-31 → 2016-02-01
    Sumburgh head light 59-51.2N 001-16.5W unreliable
  17. HYDROLANT 257/16 · Cable ops2016-01-29 → 2016-02-05
    Underwater operations in progress until further notice by cableship pierre de fermat vicinity of trackline…
  18. HYDROLANT 232/16 · Debris2016-01-27 → 2016-01-30
    Debris field reported vicinity 58-59.7N 004-28.7E at 271040Z jan
  19. HYDROLANT 229/16 · Other2016-01-27 → 2016-02-15
    All navigational aids at platforms within seven miles of 53-27N 002-20E unreliable
  20. HYDROLANT 227/16 · Nav aids2016-01-27 → 2016-01-28
    Out skerries light 60-25.5N 000-43.7W unreliable

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