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 858/99 · Other1999-04-29 → 2001-01-09
    Auskerry light 59-01.5N 002-34.2W at reduced intensity
  2. HYDROLANT 857/99 · Other1999-04-29 → 1999-11-08
    Start point light 59-16.7N 002-22.5W at reduced intensity
  3. HYDROLANT 846/99 · Nav aids1999-04-28 → 1999-04-28
    Dgps service at girdle ness light 57-08N 002-03W unreliable 281000Z to 281400Z apr
  4. HYDROLANT 842/99 · Nav aids1999-04-28 → 1999-04-29
    Coquet island light 55-20.0N 001-32.2W unlit 280700Z to 281930Z and 290700Z to 291935Z apr
  5. HYDROLANT 838/99 · Surveys1999-04-27 → 1999-04-27
    Underwater operations in progress until further notice by M/V seeryp 1 in vicinity of trackline joining…
  6. HYDROLANT 836/99 · Nav aids1999-04-27 → 1999-04-27
    Dgps service at sumburgh head light 59-51N 001-16W unreliable 271300Z to 271700Z apr
  7. HYDROLANT 834/99 · Nav aids1999-04-27 → 1999-04-27
    Dgps service at flamborough head light 54-07N 000-05W unreliable 271200Z to 271600Z apr
  8. HYDROLANT 829/99 · Nav aids1999-04-27 → 1999-04-30
    Stroma light 58-42N 003-07W unreliable
  9. HYDROLANT 824/99 · Nav aids1999-04-26 → 1999-04-26
    Dgps service at north foreland light 51-23N 001-27E unreliable 261200Z to 261600Z apr
  10. HYDROLANT 820/99 · Nav aids1999-04-25 → 1999-04-26
    Fog signal at inchkeith light 56-02N 003-08W inoperative
  11. HYDROLANT 807/99 · Surveys1999-04-24 → 1999-04-25
    Underwater operations in progress until further notice by M/V scotian shore between 51-23.0N 002-25.2E and…
  12. HYDROLANT 800/99 · Nav aids1999-04-23 → 1999-04-24
    Swilkie point light 58-42N 003-07W unreliable
  13. HYDROLANT 774/99 · Nav aids1999-04-19 → 1999-04-24
    Ruytingen sw buoy 51-05N 001-47E missing
  14. HYDROLANT 765/99 · Surveys1999-04-18 → 1999-04-23
    Underwater operations in progress until further notice by M/V scotian shore along trackline between 51-23N…
  15. HYDROLANT 740/99 · Nav aids1999-04-15 → 1999-04-16
    Muckle skerry light 60-26N 000-52W unlit
  16. HYDROLANT 721/99 · Surveys1999-04-14 → 1999-04-18
    Survey operations in progress until further notice by M/V scotian shore towing equipment along trackline…
  17. HYDROLANT 701/99 · Cable ops1999-04-10 → 1999-04-19
    Underwater cable operations in progress until further notice by M/V monarch within one mile of 51-33N 001-56E
  18. HYDROLANT 687/99 · Nav aids1999-04-08 → 1999-04-14
    Stroma island light 58-42N 003-07W unreliable
  19. HYDROLANT 685/99 · Cable ops1999-04-08 → 1999-04-12
    Cable operations in progress until further notice by M/V jean charcot towing equipment in vicinity of…
  20. HYDROLANT 672/99 · Nav aids1999-04-06 → 1999-04-07
    Stroma island light 58-42N 003-07W 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.