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 1211/03 · Cable ops2003-06-21 → 2003-06-22
    Cable operations in progress until further notice by cableship maersk defender vicinity 52-41N 002-17E
  2. HYDROLANT 1192/03 · Other2003-06-19 → 2003-08-02
    F/V hanstholmen lysz taking on water and in need of assistance in 58-58N 000-17E
  3. HYDROLANT 1125/03 · Nav aids2003-06-09 → 2003-06-11
    Dgps station at sumburgh head light 59-51N 001-17W inoperative 091300Z to 091400Z jun and at reduced power…
  4. HYDROLANT 1117/03 · Wrecks2003-06-07 → 2004-06-16
    Dangerous wreck marked by east cardinal buoy, q (3) 10 sec in 53-45.02N 000-20.56E
  5. HYDROLANT 1108/03 · Wrecks2003-06-06 → 2003-06-07
    Dangerous wreck marked by three yellow and two red buoys in 53-45.0N 000-20.6E
  6. HYDROLANT 1098/03 · Surveys2003-06-05 → 2003-06-09
    Underwater operations in progress until further notice by M/V sea explorer vicinity of trackline between…
  7. HYDROLANT 1054/03 · Surveys2003-05-30 → 2003-06-05
    Survey operations in progress until further notice by M/V svitzer mercator within two miles of 53-09N 002-46E
  8. HYDROLANT 1001/03 · Mines2003-05-22 → 2003-05-22
    Possible mine adrift in 56-07.3N 001-54.4W at 220545Z may
  9. HYDROLANT 994/03 · Other2003-05-21 → 2003-06-20
    Pipelaying operations in progress until further notice by M/V castoro sei vicinity of trackline joining…
  10. HYDROLANT 982/03 · Nav aids2003-05-20 → 2003-05-20
    Coquet island light 55-20N 001-32W unlit 200700Z to 201700Z may
  11. HYDROLANT 974/03 · Nav aids2003-05-19 → 2003-05-19
    Coquet island light 55-20N 001-32W unlit 190800Z to 191500Z may
  12. HYDROLANT 969/03 · Surveys2003-05-17 → 2003-05-21
    Underwater operations in progress until further notice by M/V svitzer meridian towing three mile long cable…
  13. HYDROLANT 964/03 · Nav aids2003-05-17 → 2003-05-28
    Mdw buoy 51-19N 001-59E unlit
  14. HYDROLANT 956/03 · Nav aids2003-05-15 → 2003-05-15
    Coquet island light 55-20.0N 001-32.2W range temporarily reduced to 17 miles
  15. HYDROLANT 949/03 · Nav aids2003-05-14 → 2003-05-15
    Stirling dgps station 56-04N 004-04W off air 151000Z to 151400Z may
  16. HYDROLANT 901/03 · Nav aids2003-05-05 → 2003-05-07
    Sandettie north buoy 51-18N 002-05E unlit
  17. HYDROLANT 859/03 · Nav aids2003-04-29 → 2003-04-30
    Dsc station and mf mrsc shetland 60-10N 001-08W inoperative 300900Z to 301500Z apr
  18. HYDROLANT 843/03 · Other2003-04-25 → 2003-04-29
    Fog signal at inner dowsing lightship 53-19.5N 000-34.0E at reduced power
  19. HYDROLANT 767/03 · Nav aids2003-04-12 → 2003-04-17
    Sandettie north buoy 51-18.4N 002-04.8E unlit
  20. HYDROLANT 691/03 · Surveys2003-04-03 → 2003-04-09
    Survey operations in progress until further notice by M/V confidante within 2.5 miles of 51-14N 001-51E

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