North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
6
since 1997
4,731
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 aids2,50253%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,730 cancelled

  1. HYDROLANT 1134/11 · Nav aids2011-07-12 → 2011-07-14
    Nga chart 37120 (3RD ed)
  2. HYDROLANT 1109/11 · Nav aids2011-07-05 → 2011-07-08
    Nga chart 37058 (2ND ed)
  3. HYDROLANT 1107/11 · Nav aids2011-07-04 → 2011-07-13
    Mrcc humber 54-07N 000-05W mf dsc unreliable
  4. HYDROLANT 1103/11 · Nav aids2011-07-03 → 2011-07-11
    Mrcc aberdeen 57-08N 002-03W mf rt service unreliable
  5. HYDROLANT 1101/11 · Cable ops2011-07-03 → 2011-07-20
    Seismic survey in progress until further notice by M/V western regent towing eight 3000 meter long cables in…
  6. HYDROLANT 1087/11 · Cable ops2011-07-01 → 2011-07-15
    Seismic survey in progress until 312359Z jul by M/V geco triton towing ten 60000 meter long cables in area…
  7. HYDROLANT 1070/11 · Nav aids2011-06-29 → 2011-06-29
    Nga chart 35013 (0 ed)
  8. HYDROLANT 1067/11 · Other2011-06-28 → 2011-07-18
    Nga chart 37058 (2ND ed)
  9. HYDROLANT 1062/11 · Nav aids2011-06-28 → 2011-06-29
    Nga chart 35013 (0 ed)
  10. HYDROLANT 1061/11 · Nav aids2011-06-27 → 2011-06-28
    Nga chart 37058 (2ND ed)
  11. HYDROLANT 1038/11 · Cable ops2011-06-23 → 2011-07-02
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-49.15N…
  12. HYDROLANT 1019/11 · Nav aids2011-06-20 → 2011-07-17
    Nga chart 37059 (0 ed)
  13. HYDROLANT 1012/11 · Nav aids2011-06-19 → 2011-06-19
    Nga chart 35055 (1ST ed)
  14. HYDROLANT 1002/11 · Wrecks2011-06-16 → 2011-07-27
    Nga chart 35000(26TH ed)
  15. HYDROLANT 990/11 · Nav aids2011-06-13 → 2011-06-16
    Dgps station at flamborough head light 54-07N 000-05W unusable 140800Z to 161600Z jun
  16. HYDROLANT 979/11 · Nav aids2011-06-12 → 2011-06-12
    Nga chart 35014 (2ND ed)
  17. HYDROLANT 927/11 · Cable ops2011-06-03 → 2011-06-11
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-34.5N 002-14.7E
  18. HYDROLANT 912/11 · Nav aids2011-05-31 → 2011-06-11
    Nga chart 35010 (1ST ed)
  19. HYDROLANT 849/11 · Cable ops2011-05-19 → 2011-06-14
    Seismic survey in progress until further notice by M/V ramform viking towing 12 6500 meter long cables in…
  20. HYDROLANT 847/11 · Nav aids2011-05-19 → 2011-05-20
    Nga chart 35006 (1ST ed)

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