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 2257/01 · Surveys2001-08-15 → 2001-08-18
    Underwater operations in progress until further notice by M/V neftegaz 66 vicinity of trackline between…
  2. HYDROLANT 2250/01 · Other2001-08-14 → 2001-08-18
    Exposed cable vicinity 54-12.7N 000-02.5E
  3. HYDROLANT 2248/01 · Cable ops2001-08-14 → 2001-08-15
    Underwater operations in progress until further notice by cableship dock express 20 vicinity of trackline…
  4. HYDROLANT 2225/01 · Other2001-08-12 → 2001-08-26
    Exposed cable vicinity 51-35N 001-57E
  5. HYDROLANT 2191/01 · Containers2001-08-07 → 2001-08-14
    Container adrift vicinity 54-48.9N 001-17.8W at 071637Z aug
  6. HYDROLANT 2151/01 · Cable ops2001-08-01 → 2001-08-14
    Underwater operations in progress until further notice by cableship dock express 20 vicinity of trackline…
  7. HYDROLANT 2150/01 · Surveys2001-08-01 → 2001-08-14
    Underwater operations in progress until further notice by M/V seaway rover vicinity of trackline between…
  8. HYDROLANT 2143/01 · Nav aids2001-08-01 → 2001-08-01
    Cromer light 52-55N 001-19E unlit and RACON inoperative 010700Z to 011500Z aug
  9. HYDROLANT 2123/01 · Surveys2001-07-29 → 2001-07-30
    Underwater operations in progress until further notice by M/V highland fortress in areas: a. within one mile…
  10. HYDROLANT 2120/01 · Cable ops2001-07-29 → 2001-08-01
    Underwater operations in progress until further notice by cableship dock express 20 vicinity of trackline…
  11. HYDROLANT 2116/01 · Nav aids2001-07-28 → 2001-07-28
    Sumburgh head light 59-51N 001-16W unreliable
  12. HYDROLANT 2111/01 · Surveys2001-07-28 → 2001-07-29
    Underwater operations in progress until further notice by M/V normand tonjer with submersible vicinity of…
  13. HYDROLANT 2108/01 · Nav aids2001-07-27 → 2001-07-30
    Abbeville west buoy 55-56N 001-38E off station
  14. HYDROLANT 2100/01 · Nav aids2001-07-27 → 2001-07-30
    Ruytingen east buoy 51-15N 002-18E unlit
  15. HYDROLANT 2094/01 · Other2001-07-26 → 2001-07-27
    Start point light 59-17N 002-22W at reduced intensity
  16. HYDROLANT 2091/01 · Surveys2001-07-26 → 2001-07-27
    Underwater operations in progress until further notice by M/V eas vicinity 52-50N 002-42E
  17. HYDROLANT 2080/01 · Nav aids2001-07-25 → 2001-07-25
    Coquet light 55-20N 001-32W unlit
  18. HYDROLANT 2079/01 · Surveys2001-07-25 → 2001-07-29
    Underwater operations in progress until further notice by M/V highland fortress vicinity of trackline…
  19. HYDROLANT 2076/01 · Surveys2001-07-24 → 2001-07-25
    Underwater operations in progress until further notice by M/V highland fortress within one mile of 51-07N…
  20. HYDROLANT 2072/01 · Surveys2001-07-24 → 2001-07-26
    Underwater operations in progress until further notice by M/V eas vicinity of 53-17N 002-25E

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