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 1773/99 · Derelicts1999-08-24 → 1999-08-24
    Vessel with hazardous cargo on fire and adrift in 51-29.9N 001-51.2E at 240320Z aug
  2. HYDROLANT 1761/99 · Surveys1999-08-21 → 1999-08-25
    Underwater operations in progress until further notice by dsv orelia in 54-11.0N 001-24.8E
  3. HYDROLANT 1755/99 · Other1999-08-21 → 1999-08-30
    Hinder buoy 51-21N 002-11E damaged and unreliable
  4. HYDROLANT 1752/99 · Surveys1999-08-20 → 1999-08-27
    Underwater operations in progress until further notice by M/V challenger with submersible within four miles…
  5. HYDROLANT 1749/99 · Cable ops1999-08-20 → 1999-08-23
    Cable operations in progress until further notice by cableship monarch along trackline joining 51-05N…
  6. HYDROLANT 1740/99 · Derelicts1999-08-19 → 1999-08-27
    Derelict F/V gerda maria on fire and adrift in 53-30.6N 003-01.3E at 182331Z aug
  7. HYDROLANT 1738/99 · Other1999-08-18 → 1999-08-19
    F/V gerda maria on fire in 53-30N 002-57E
  8. HYDROLANT 1726/99 · Nav aids1999-08-18 → 1999-08-18
    Orford ness light 52-05N 001-35E unreliable
  9. HYDROLANT 1714/99 · Cable ops1999-08-16 → 1999-08-25
    Seismic survey in progress until further notice by M/V geo surveyor towing 700 meter long cable within one…
  10. HYDROLANT 1663/99 · Nav aids1999-08-10 → 1999-08-10
    Orfordness light 52-05N 001-35E unreliable
  11. HYDROLANT 1652/99 · Surveys1999-08-07 → 1999-08-14
    Underwater operations in progress until further notice by M/V goosander vicinity of trackline joining 52-13N…
  12. HYDROLANT 1617/99 · Other1999-08-04 → 1999-08-11
    Abandoned fishing gear marked by buoy in 58-21.3N 000-12.6E
  13. HYDROLANT 1603/99 · Cable ops1999-08-03 → 1999-08-06
    Cable operations in progress until further notice by cableship goosander within two miles of 51-22.8N…
  14. HYDROLANT 1600/99 · Cable ops1999-08-02 → 1999-08-03
    Cable operations in progress until further notice by cableship goosander within two miles of 51-20.4N…
  15. HYDROLANT 1597/99 · Cable ops1999-08-02 → 1999-08-02
    Cable operations in progress until further notice by cableship goosander within two miles of 51-19N 002-15E
  16. HYDROLANT 1581/99 · Nav aids1999-07-31 → 1999-08-03
    Ruytingen west buoy 51-07N 001-51E unlit
  17. HYDROLANT 1563/99 · Nav aids1999-07-30 → 1999-07-31
    Ruytingen west buoy 51-07N 001-51E unlit
  18. HYDROLANT 1559/99 · Nav aids1999-07-29 → 1999-07-29
    RACON at buchan ness light 57-28N 001-46W inoperative 290830Z to 291230Z jul
  19. HYDROLANT 1557/99 · Other1999-07-28 → 1999-10-22
    Platform established in 55-47.3N 003-59.4E
  20. HYDROLANT 1550/99 · Other1999-07-27 → 1999-10-08
    Platform established in 56-04.8N 004-13.9E

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