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 3115/14 · Other2014-12-22 → 2014-12-30
    All navigational aids at platforms inoperative: a. 49/17-DD, 53-26.4N 002-23.6E
  2. HYDROLANT 3088/14 · Debris2014-12-19 → 2014-12-22
    Large yellow subsea buoy adrift vicinity 52-17.2N 002-10.4E at 182140Z dec
  3. HYDROLANT 3068/14 · Other2014-12-16 → 2014-12-23
    Meteorological mast established in 56-26.40N 002-14.49W
  4. HYDROLANT 3052/14 · Nav aids2014-12-15 → 2014-12-16
    Copinsay light 58-53.8N 002-40.2W unlit
  5. HYDROLANT 3035/14 · Nav aids2014-12-12 → 2014-12-13
    Firths voe light 60-27.2N 001-10.6W unreliable
  6. HYDROLANT 3021/14 · Nav aids2014-12-11 → 2014-12-11
    Firths voe light 60-27.2N 001-10.6W unreliable
  7. HYDROLANT 2992/14 · Nav aids2014-12-08 → 2014-12-09
    Copinsay light 58-53.8N 002-40.2W unlit
  8. HYDROLANT 2975/14 · Nav aids2014-12-06 → 2015-01-17
    All navigational aids at platform 49/16, 53-23.2N 002-08.9E inoperative
  9. HYDROLANT 2952/14 · Other2014-12-03 → 2014-12-05
    Pipelaying operations in progress until further notice by M/V deep energy vicinity of trackline between…
  10. HYDROLANT 2935/14 · Nav aids2014-12-02 → 2014-12-02
    Fog signal at flamborough head light 54-07.0N 000-04.8W inoperative
  11. HYDROLANT 2920/14 · Nav aids2014-11-30 → 2015-01-12
    All navigational aids at katy platform 54-24.1N 002-39.3E inoperative
  12. HYDROLANT 2905/14 · Nav aids2014-11-28 → 2015-02-12
    Meteorological mast 51-56.6N 001-55.3E unlit
  13. HYDROLANT 2898/14 · Nav aids2014-11-28 → 2014-12-07
    All navigational aids at platform 49/16 vampire, 53-27.9N 002-02.5E inoperative
  14. HYDROLANT 2861/14 · Nav aids2014-11-25 → 2015-01-06
    Ruytingen sw buoy 51-04.3N 001-45.8E off station
  15. HYDROLANT 2852/14 · Wrecks2014-11-24 → 2015-04-02
    Dangerous wreck, least depth 24.8 meters, in 52-48.26N 001-49.39E
  16. HYDROLANT 2847/14 · Cable ops2014-11-23 → 2015-01-08
    Seismic survey in progress until further notice by M/V oceanic phoenix towing eight 8500 meter long cables…
  17. HYDROLANT 2842/14 · Nav aids2014-11-23 → 2015-02-28
    All navigational aids at mimas platform 53-45.8N 001-42.3E inoperative
  18. HYDROLANT 2839/14 · Nav aids2014-11-23 → 2014-12-30
    Fog signal at platform 48/14-PG, 53-31.2N 001-48.0E inoperative
  19. HYDROLANT 2830/14 · Nav aids2014-11-21 → 2014-11-25
    All navigational aids at platform 49/16, 53-27.9N 002-02.5E inoperative
  20. HYDROLANT 2829/14 · Other2014-11-21 → 2015-01-02
    Humber lightfloat 53-38.7N 000-21.2E temporarily replaced by buoy, green, lfl w 10 sec

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