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 2536/99 · Surveys1999-11-26 → 1999-11-30
    Underwater operations in progress until further notice by M/V brodospas moon along trackline joining 52-11N…
  2. HYDROLANT 2525/99 · Cable ops1999-11-24 → 1999-12-08
    Cable operations in progress until further notice by cableship maersk defender vicinity of trackline joining…
  3. HYDROLANT 2513/99 · Surveys1999-11-23 → 1999-11-30
    Underwater operations in progress until further notice by M/V granit vicinity of trackline between 52-20N…
  4. HYDROLANT 2509/99 · Nav aids1999-11-23 → 1999-11-24
    Bergues buoy 51-17N 002-19E unlit
  5. HYDROLANT 2507/99 · Nav aids1999-11-23 → 1999-11-27
    Bell rock light 56-26N 002-23W unreliable
  6. HYDROLANT 2501/99 · Surveys1999-11-22 → 1999-11-26
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  7. HYDROLANT 2496/99 · Surveys1999-11-21 → 1999-11-22
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  8. HYDROLANT 2493/99 · Surveys1999-11-21 → 1999-11-23
    Underwater operations in progress until further notice by M/V granit vicinity of trackline between 52-23N…
  9. HYDROLANT 2482/99 · Surveys1999-11-19 → 1999-11-21
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  10. HYDROLANT 2469/99 · Nav aids1999-11-17 → 1999-12-16
    RACON at rumble rock beacon 60-28N 001-07W inoperative
  11. HYDROLANT 2467/99 · Surveys1999-11-17 → 1999-11-19
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  12. HYDROLANT 2466/99 · Surveys1999-11-17 → 1999-11-17
    Underwater operations in progress until further notice by M/V granit vicinity of trackline between 52-25N…
  13. HYDROLANT 2462/99 · Nav aids1999-11-16 → 1999-11-17
    Kinnairds head light 57-42N 002-00W unreliable
  14. HYDROLANT 2461/99 · Wrecks1999-11-16 → 2000-11-10
    Obstruction, depth 2.8 meters, vicinity 51-11.7N 002-26.7E
  15. HYDROLANT 2460/99 · Nav aids1999-11-16 → 1999-11-20
    Balta island light 60-45N 000-48W unlit
  16. HYDROLANT 2444/99 · Surveys1999-11-14 → 1999-11-17
    Underwater operations in progress until further notice by M/V brodospas moon vicinity of trackline between…
  17. HYDROLANT 2438/99 · Surveys1999-11-13 → 1999-11-17
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  18. HYDROLANT 2430/99 · Cable ops1999-11-12 → 1999-11-14
    Underwater operations in progress until further notice by cableship brodopas moon vicinity of trackline…
  19. HYDROLANT 2428/99 · Nav aids1999-11-12 → 1999-11-12
    Southeast goodwin buoy 51-13N 001-35E unlit
  20. HYDROLANT 2425/99 · Nav aids1999-11-12 → 1999-11-13
    Swilkie point 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.