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 1332/99 · Cable ops1999-06-28 → 1999-07-01
    Underwater cable operations in progress until further notice by M/V toisa coral with submersible within…
  2. HYDROLANT 1319/99 · Cable ops1999-06-25 → 1999-07-07
    Cable operations in progress until further notice by M/V toisa mariner with submersible along trackline…
  3. HYDROLANT 1310/99 · Nav aids1999-06-25 → 1999-06-26
    Duncansby head light 58-39N 003-01W unreliable
  4. HYDROLANT 1295/99 · Nav aids1999-06-23 → 1999-06-23
    Pentland skerries light 58-41N 002-55W unlit
  5. HYDROLANT 1274/99 · Cable ops1999-06-20 → 1999-06-25
    Cable operations in progress until further notice by M/V toisa mariner with submersible along trackline…
  6. HYDROLANT 1224/99 · Cable ops1999-06-12 → 1999-06-20
    Cable operations in progress until further notice by M/V toisa mariner with submersible between 52-26N…
  7. HYDROLANT 1219/99 · Cable ops1999-06-12 → 1999-06-14
    Cable operations in progress until further notice by cableship pacific blade with submersible within two…
  8. HYDROLANT 1218/99 · Cable ops1999-06-11 → 1999-06-12
    Cable operations in progress until further notice by cableship pacific blade with submersible within two…
  9. HYDROLANT 1214/99 · Nav aids1999-06-11 → 1999-06-12
    Mrcc yarmouth VHF dsc stations langham 52-57N 000-57E and trimingham 52-55N 001-21E off air
  10. HYDROLANT 1206/99 · Nav aids1999-06-10 → 1999-06-15
    Ruytingen west buoy 51-06.9N 001-50.5E missing
  11. HYDROLANT 1203/99 · Surveys1999-06-10 → 1999-06-11
    Underwater operations in progress until further notice by M/V stephaniturm with submersible within 1.5 miles…
  12. HYDROLANT 1177/99 · Cable ops1999-06-07 → 1999-06-08
    Cable operations in progress until further notice by cableship pacific blade with submersible within two…
  13. HYDROLANT 1151/99 · Nav aids1999-06-04 → 1999-06-17
    RACON at rumble rock beacon 60-28N 001-07W inoperative
  14. HYDROLANT 1144/99 · Cable ops1999-06-04 → 1999-06-10
    Cable operations in progress until further notice by cableship monarch vicinity 51-35.2N 001-56.7E
  15. HYDROLANT 1141/99 · Surveys1999-06-03 → 1999-06-04
    Underwater operations in progress until further notice by M/V stephaniturm with submersible vicinity…
  16. HYDROLANT 1128/99 · Nav aids1999-06-02 → 1999-06-16
    Ruytingen west buoy 51-07N 001-51E unlit
  17. HYDROLANT 1125/99 · Cable ops1999-06-01 → 1999-06-12
    Cable operations in progress until further notice by M/V toisa mariner with submersible between 52-37N…
  18. HYDROLANT 1116/99 · Cable ops1999-06-01 → 1999-06-05
    Cable operations in progress until further notice by M/V pacific blade with submersible within one mile of…
  19. HYDROLANT 1083/99 · Nav aids1999-05-26 → 1999-05-27
    RACON at st
  20. HYDROLANT 1048/99 · Cable ops1999-05-22 → 1999-05-25
    Cable operations in progress until further notice by cableship peter fabre vicinity 51-11N 002-07E

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