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 2066/01 · Nav aids2001-07-24 → 2003-02-07
    Fog signal at ruytingen sw buoy 51-05N 001-47E inoperative
  2. HYDROLANT 2058/01 · Surveys2001-07-23 → 2001-07-24
    Underwater operations in progress until further notice by M/V eas vicinity of 53-29N 002-25E
  3. HYDROLANT 2033/01 · Surveys2001-07-19 → 2001-07-23
    Underwater operations in progress until further notice by M/V eas vicinity 53-34N 002-25E
  4. HYDROLANT 2025/01 · Surveys2001-07-18 → 2001-07-19
    Underwater operations in progress until further notice by M/V eas vicinity 52-37.3N 002-16.6E
  5. HYDROLANT 2019/01 · Cable ops2001-07-18 → 2001-07-22
    Underwater operations in progress until further notice by cableship maersk forwarder vicinity 51-07N 001-55E
  6. HYDROLANT 2007/01 · Other2001-07-17 → 2001-07-18
    Coversea skerries light 57-44N 003-20W at reduced intensity
  7. HYDROLANT 1995/01 · Cable ops2001-07-15 → 2001-07-19
    Underwater cable operations in progress until further notice by cableship monarch vicinity 51-15N 002-38E
  8. HYDROLANT 1992/01 · Surveys2001-07-15 → 2001-07-15
    Underwater operations in progress until further notice by M/V eas vicinity 52-33.9N 002-14.3E
  9. HYDROLANT 1971/01 · Nav aids2001-07-12 → 2001-07-14
    Sumburgh head light 59-51.3N 001-16.3W unreliable
  10. HYDROLANT 1968/01 · Surveys2001-07-12 → 2001-07-15
    Underwater operations in progress until further notice by M/V eas vicinity 52-32.2N 002-13.3E
  11. HYDROLANT 1950/01 · Containers2001-07-10 → 2001-07-17
    Container adrift in 55-58.1N 000-38.8W at 102145Z jul
  12. HYDROLANT 1948/01 · Surveys2001-07-10 → 2001-07-24
    Underwater operations in progress until further notice by M/V skandi neptune within three miles of 54-30N…
  13. HYDROLANT 1946/01 · Surveys2001-07-10 → 2001-07-16
    Underwater operations in progress until further notice by M/V havila reel vicinity 51-13N 002-07E
  14. HYDROLANT 1943/01 · Surveys2001-07-10 → 2001-07-10
    Underwater operations in progress until further notice by M/V havila reel vicinity 51-11N 002-07E
  15. HYDROLANT 1940/01 · Containers2001-07-10 → 2001-07-17
    Container adrift in 51-43.9N 002-04.6E at 100510Z jul
  16. HYDROLANT 1928/01 · Surveys2001-07-08 → 2001-07-10
    Underwater operations in progress until further notice by M/V havila reel vicinity of trackline beteen…
  17. HYDROLANT 1927/01 · Surveys2001-07-08 → 2001-07-12
    Underwater operations in progress until further notice by M/V eas vicinity 53-42.8N 002-23.2E
  18. HYDROLANT 1926/01 · Other2001-07-08 → 2002-01-11
    Fishing nets with floats anchored in 54-19.6N 000-15.8E
  19. HYDROLANT 1921/01 · Surveys2001-07-07 → 2001-07-08
    Underwater operations in progress until further notice by M/V eas vicinity 53-44.3N 002-23.1E
  20. HYDROLANT 1914/01 · Surveys2001-07-06 → 2001-07-07
    Underwater operations in progress until further notice by M/V eas vicinity 53-46N 002-23E

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