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 2062/02 · Nav aids2002-09-14 → 2002-09-17
    Fairy south buoy 51-21N 002-17E unlit
  2. HYDROLANT 2056/02 · Surveys2002-09-14 → 2002-09-22
    Oceanographic operations in progress until further notice by M/V triton within 1.5 miles of trackline…
  3. HYDROLANT 2038/02 · Nav aids2002-09-12 → 2002-09-13
    Bell rock light 56-26N 002-23W unreliable
  4. HYDROLANT 2036/02 · Nav aids2002-09-12 → 2002-09-13
    Isle of may light 56-11N 002-34W unreliable
  5. HYDROLANT 2011/02 · Nav aids2002-09-09 → 2002-09-10
    Isle of may light 56-11N 002-34W unreliable
  6. HYDROLANT 1953/02 · Surveys2002-09-02 → 2002-09-04
    Underwater operations in progress until further notice by M/V aquamarine vicinity 53-10.3N 002-42.1E
  7. HYDROLANT 1934/02 · Surveys2002-08-30 → 2002-08-31
    Underwater operations in progress until further notice by M/V aquamarine within one mile of 53-00.0N 002-40.3E
  8. HYDROLANT 1857/02 · Nav aids2002-08-22 → 2002-08-22
    Dgps station at girdle ness light 57-08N 002-02W inoperative 220900Z to 221300Z aug
  9. HYDROLANT 1824/02 · Surveys2002-08-17 → 2002-08-18
    Survey operations in progress until further notice by M/V flatholm within three miles of 51-48N 001-32E
  10. HYDROLANT 1807/02 · Nav aids2002-08-15 → 2002-08-18
    Fog signal at F3 lightvessel 51-24N 002-00E unreliable
  11. HYDROLANT 1724/02 · Nav aids2002-08-04 → 2002-08-04
    Isle of may light 56-11.2N 002-33.3W unreliable
  12. HYDROLANT 1717/02 · Nav aids2002-08-03 → 2002-08-03
    Isle of may light 56-11.2N 002-33.3W unreliable
  13. HYDROLANT 1703/02 · Nav aids2002-07-31 → 2002-08-01
    Isle of may light 56-11.2N 002-33.3W unreliable
  14. HYDROLANT 1690/02 · Cable ops2002-07-30 → 2002-08-02
    Seismic survey in progress until further notice by M/V geo searcher towing one mile long cable vicinity…
  15. HYDROLANT 1626/02 · Cable ops2002-07-23 → 2002-08-03
    Seismic survey in progress until further notice by M/V geo searcher towing 600 meter long cable vicinity…
  16. HYDROLANT 1615/02 · Cable ops2002-07-21 → 2002-07-31
    Underwater cable operations in progress until further notice by cableship maersk defender vicinity 52-46.2N…
  17. HYDROLANT 1596/02 · Nav aids2002-07-20 → 2002-07-20
    Flambourough head light 54-07N 000-05W unreliable
  18. HYDROLANT 1573/02 · Cable ops2002-07-16 → 2002-07-20
    Seismic survey in progress until further notice by M/V geo searcher towing 600 meter long cable vicinity…
  19. HYDROLANT 1530/02 · Nav aids2002-07-10 → 2002-07-10
    Dgps station at flambourough head light 54-07N 000-05W unreliable 100800Z to 101600Z jul
  20. HYDROLANT 1508/02 · Wrecks2002-07-08 → 2002-07-15
    Dangerous wreck reported 51-56.1N 001-49.7E

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