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 186/03 · Wrecks2003-01-26 → 2003-01-31
    Dangerous wreck reported in 54-02.15N 004-45.80E marked by: a. east cardinal buoy
  2. HYDROLANT 178/03 · Cable ops2003-01-26 → 2003-01-28
    Underwater operations 260500Z jan until further notice by cableship maersk defender vicinity 51-12.0N…
  3. HYDROLANT 175/03 · Wrecks2003-01-25 → 2003-01-26
    Dangerous wreck reported in 54-02N 004-45E
  4. HYDROLANT 149/03 · Nav aids2003-01-21 → 2003-01-23
    Dgps station at girdle ness light 57-08.3N 002-02.8W inoperative
  5. HYDROLANT 147/03 · Nav aids2003-01-21 → 2003-01-22
    Haisbro buoy 52-51N 001-48E missing
  6. HYDROLANT 70/03 · Nav aids2003-01-11 → 2003-01-11
    Dgps station at north foreland light 51-23N 001-27E inoperative 110800Z to 111600Z jan
  7. HYDROLANT 67/03 · Wrecks2003-01-10 → 2004-06-16
    Eight meter depth reported in 51-01.40N 001-50.65E
  8. HYDROLANT 66/03 · Nav aids2003-01-10 → 2003-02-03
    Fairy west buoy 51-23.9N 002-09.2E unlit
  9. HYDROLANT 60/03 · Nav aids2003-01-10 → 2003-01-10
    Dgps station at girdle ness light 57-08N 002-02W inoperative 101000Z to 101300Z jan
  10. HYDROLANT 59/03 · Nav aids2003-01-10 → 2003-02-11
    Sandettie east buoy 51-15N 002-03E unlit
  11. HYDROLANT 57/03 · Cable ops2003-01-10 → 2003-01-13
    Underwater operations in progress until further notice by cableship maersk defender displaying RACON (d)…
  12. HYDROLANT 35/03 · Nav aids2003-01-05 → 2003-02-26
    RACON at humber lightfloat 53-39N 000-20E inoperative
  13. HYDROLANT 34/03 · Nav aids2003-01-05 → 2003-01-16
    Fairy south buoy 51-21N 002-17E unlit
  14. HYDROLANT 33/03 · Cable ops2003-01-05 → 2003-02-17
    Seismic survey in progress until further notice by M/V svitzer meridian towing two mile long cable in area…
  15. HYDROLANT 4/03 · Nav aids2003-01-01 → 2003-01-10
    Sandettie north buoy 51-18N 002-05E unlit
  16. HYDROLANT 3/03 · Nav aids2003-01-01 → 2003-01-02
    Sunk lightvessel 51-51N 001-35E unreliable
  17. HYDROLANT 2848/02 · Surveys2002-12-27 → 2004-04-16
    Dangerous wreck in 51-22.0N 002-12.8E marked by: a. north, east and west cardinal buoys
  18. HYDROLANT 2838/02 · Nav aids2002-12-24 → 2003-01-02
    Fairy west buoy 51-23.9N 002-09.2E unlit
  19. HYDROLANT 2836/02 · Surveys2002-12-24 → 2002-12-27
    Dangerous wreck in 51-21.9N 002-12.7E marked by: a. east and west cardinal buoys
  20. HYDROLANT 2831/02 · Nav aids2002-12-23 → 2003-02-17
    Bergues buoy 51-17N 002-19E unlit

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