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 2951/16 · Nav aids2016-11-07 → 2016-12-19
    Thanet wind farm turbine fog signals 51-26N 001-38E unreliable
  2. HYDROLANT 2929/16 · Nav aids2016-11-05 → 2016-11-07
    Auskerry light 59-01.5N 002-34.3W unreliable
  3. HYDROLANT 2928/16 · Nav aids2016-11-05 → 2016-11-05
    Auskerry light 59-01.5N 002-34.3W unreliable
  4. HYDROLANT 2925/16 · Nav aids2016-11-04 → 2016-11-05
    All navigational aids at platform 49/9B, 53-49.9N 002-46.3E inoperative
  5. HYDROLANT 2923/16 · Nav aids2016-11-04 → 2016-11-28
    Stirling dgps station 56-04N 004-04W off air 0800Z to 1630Z daily until 08 dec
  6. HYDROLANT 2914/16 · Nav aids2016-11-04 → 2016-11-29
    Cgoc aberdeen mf dsc service at greg ness 57-07.6N 002-03.2W off air
  7. HYDROLANT 2911/16 · Nav aids2016-11-03 → 2016-11-04
    Stirling dgps station 56-04N 004-04W off air until 041630Z nov, 0800Z to 1630Z daily 05 nov thru 08 dec
  8. HYDROLANT 2900/16 · Nav aids2016-11-03 → 2016-11-04
    Cgoc aberdeen mf dsc service at greg ness 57-07.6N 002-03.2W off air
  9. HYDROLANT 2899/16 · Nav aids2016-11-03 → 2016-11-03
    Dgps station at north foreland light 51-22.5N 001-26.7E unreliable
  10. HYDROLANT 2885/16 · Nav aids2016-11-02 → 2016-11-07
    All navigational aids at platform 49/16, 53-23.2N 002-08.9E inoperative
  11. HYDROLANT 2859/16 · Nav aids2016-10-31 → 2016-11-03
    Stirling dgps station 56-04N 004-04W off air 0800Z to 1630Z daily, monday thru friday, until 08 dec
  12. HYDROLANT 2856/16 · Nav aids2016-10-30 → 2016-10-31
    Graemsay range rear light 58-56.1N 003-16.3W unreliable
  13. HYDROLANT 2845/16 · Nav aids2016-10-29 → 2016-10-30
    Graemsay range rear light 58-56.1N 003-16.3W unlit
  14. HYDROLANT 2840/16 · Nav aids2016-10-29 → 2016-11-01
    Fog signal at platform 44/23-KELVIN, 54-20.0N 002-28.8E inoperative
  15. HYDROLANT 2768/16 · Cable ops2016-10-21 → 2016-10-24
    Underwater operations in progress until further notice by cableship pierre de fermat with submersible…
  16. HYDROLANT 2740/16 · Nav aids2016-10-18 → 2016-10-21
    Fog signal at platform 47/14-B1D, 53-33.7N 000-52.8E unreliable
  17. HYDROLANT 2730/16 · Exercises2016-10-17 → 2016-10-23
    Hazardous operations
  18. HYDROLANT 2708/16 · Cable ops2016-10-16 → 2016-10-20
    Pipe laying operations in progress until further notice by M/V seven cruziero vicinity 52-08.8N 002-15.4E
  19. HYDROLANT 2696/16 · Nav aids2016-10-14 → 2016-11-17
    All navigational aids at shamrock platform, 53-28.2N 002-55.3E inoperative
  20. HYDROLANT 2682/16 · Nav aids2016-10-13 → 2016-10-17
    All navigational aids at platform 48/15B-PXW, 53-34.1N 001-58.3E 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.