North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
7
since 1997
4,732
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 aids2,50353%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,731 cancelled

  1. HYDROLANT 3061/00 · Surveys2000-09-04 → 2000-09-05
    Underwater operations in progress until further notice by M/V ace nature vicinity 52-27N 002-10E
  2. HYDROLANT 3031/00 · Nav aids2000-08-31 → 2000-09-01
    Bell rock light 56-26N 002-23W unreliable
  3. HYDROLANT 3003/00 · Nav aids2000-08-29 → 2000-08-29
    Dsc station gregness 57-07N 002-02W inoperative
  4. HYDROLANT 2998/00 · Nav aids2000-08-29 → 2000-08-29
    Dsc station gregness 57-07N 002-02W inoperative
  5. HYDROLANT 2991/00 · Cable ops2000-08-28 → 2000-08-31
    Cable operations in progress until further notice by cableship monarch within one mile of 51-29.60N 001-53.85E
  6. HYDROLANT 2984/00 · Surveys2000-08-27 → 2000-09-01
    Underwater operations in progress until further notice by M/V toisa crest vicinity of trackline between…
  7. HYDROLANT 2977/00 · Wrecks2000-08-27 → 2000-09-27
    Submerged obstruction vicinity 53-17.7N 002-38.9E
  8. HYDROLANT 2964/00 · Nav aids2000-08-26 → 2000-08-28
    Bell rock light 56-26N 002-23W unreliable
  9. HYDROLANT 2927/00 · Surveys2000-08-23 → 2000-08-23
    Underwater operations in progress until further notice by M/V ace nature vicinity 55-39N 002-23E
  10. HYDROLANT 2918/00 · Nav aids2000-08-21 → 2000-08-22
    Firth of forth fairway buoy 56-03.5N 003-00.0W unlit
  11. HYDROLANT 2917/00 · Surveys2000-08-21 → 2000-08-22
    Underwater operations in progress until further notice by M/V ace nature with submersible vicinity 55-27N…
  12. HYDROLANT 2911/00 · Surveys2000-08-20 → 2000-08-21
    Underwater operations in progress until further notice by M/V ace nature vicinity 55-23N 001-27E
  13. HYDROLANT 2907/00 · Cable ops2000-08-20 → 2000-10-19
    Seismic survey in progress until further notice by M/V aker symphony towing eight three mile long cables in…
  14. HYDROLANT 2892/00 · Surveys2000-08-19 → 2000-08-20
    Underwater operations in progress until further notice by M/V ace nature vicinity of trackline between…
  15. HYDROLANT 2887/00 · Nav aids2000-08-18 → 2000-08-20
    Start point light 59-17N 002-22W unreliable
  16. HYDROLANT 2866/00 · Surveys2000-08-16 → 2000-08-18
    Underwater operations in progress until further notice by M/V seaworker within one mile of trackline between…
  17. HYDROLANT 2847/00 · Cable ops2000-08-14 → 2000-08-29
    Cable operations in progress until further notice by cableship maersk fighter vicinity of trackline between…
  18. HYDROLANT 2846/00 · Surveys2000-08-14 → 2000-08-24
    Underwater operations in progress until further notice by M/V mirfak vicinity of trackline between 54-50N…
  19. HYDROLANT 2845/00 · Nav aids2000-08-14 → 2000-08-17
    Dgps station at girdle ness light 57-08N 002-03W off air 0830Z to 1630Z daily 15 thru 17 aug
  20. HYDROLANT 2838/00 · Surveys2000-08-13 → 2000-08-14
    Underwater operations in progress until further notice by M/V mirfak vicinity of trackline between 54-24N…

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