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 2717/01 · Nav aids2001-10-19 → 2001-10-19
    Dpgs station at north foreland light 51-22N 001-27E unreliable
  2. HYDROLANT 2714/01 · Nav aids2001-10-19 → 2001-10-19
    Dgps station at north foreland light 51-22.5N 001-26.7E unreliable
  3. HYDROLANT 2699/01 · Cable ops2001-10-18 → 2001-10-25
    Seismic survey in progress until further notice by M/V geo surveyor towing 1500 meter long cables vicinity…
  4. HYDROLANT 2672/01 · Nav aids2001-10-14 → 2001-12-03
    Ruytingen southeast buoy 51-09.2N 002-08.9E unlit
  5. HYDROLANT 2658/01 · Cable ops2001-10-12 → 2001-10-18
    Underwater operations in progress until further notice by cableship monarch vicinity 51-25N 002-34E
  6. HYDROLANT 2602/01 · Nav aids2001-10-04 → 2001-12-12
    NSR-R3 light 53-38.4N 002-56.7E unlit
  7. HYDROLANT 2600/01 · Nav aids2001-10-04 → 2001-12-14
    Fog signal at conpinsay light 58-53.8N 002-40.0W discontinued
  8. HYDROLANT 2447/01 · Nav aids2001-09-11 → 2001-09-13
    Sumburgh head dgps station 59-51N 001-16W at reduced power 110830Z to 141100Z sep
  9. HYDROLANT 2392/01 · Surveys2001-09-03 → 2001-09-03
    Underwater operations in progress until further notice by M/V havila reel vicinity of trackline between…
  10. HYDROLANT 2374/01 · Other2001-08-30 → 2001-08-31
    Start point light 59-17N 002-23W at reduced intensity
  11. HYDROLANT 2344/01 · Other2001-08-26 → 2001-08-28
    Start point light 59-17N 002-23W at reduced intensity
  12. HYDROLANT 2302/01 · Nav aids2001-08-21 → 2001-08-23
    Dgps station at girdle ness light 57-08N 002-03W inoperative 211200Z to 211600Z, 220830Z to 221600Z and…
  13. HYDROLANT 2299/01 · Nav aids2001-08-21 → 2001-08-22
    Hinder 1 buoy 51-21N 002-11E unlit
  14. HYDROLANT 2296/01 · Other2001-08-21 → 2001-08-22
    Inner dowsing lightship 53-20N 000-34E at reduced intensity
  15. HYDROLANT 2295/01 · Nav aids2001-08-21 → 2001-08-21
    Inner dowsing lightship 53-20N 000-34E unlit
  16. HYDROLANT 2293/01 · Other2001-08-20 → 2001-08-30
    Pipelaying operations in progress until further notice by M/V cso apache along trackline between 53-48.2N…
  17. HYDROLANT 2276/01 · Cable ops2001-08-18 → 2001-09-03
    Underwater operations in progress until further notice by cableship dock express 20 vicinity of trackline…
  18. HYDROLANT 2266/01 · Surveys2001-08-17 → 2001-08-17
    Underwater operations in progress until further notice by M/V havila reel vicinity 54-11N 000-12E
  19. HYDROLANT 2262/01 · Surveys2001-08-16 → 2001-08-16
    Underwater operations in progress until further notice by M/V seaway rover vicinity 54-40N 000-51E
  20. HYDROLANT 2258/01 · Cable ops2001-08-15 → 2001-08-18
    Underwater operations in progress until further notice by cableship dock express 20 vicinity of trackline…

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