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 1865/08 · Nav aids2008-11-03 → 2008-11-03
    Nga chart 35059 (1ST ed)
  2. HYDROLANT 1861/08 · Nav aids2008-11-02 → 2008-11-03
    Nga chart 35050 (1ST ed)
  3. HYDROLANT 1856/08 · Nav aids2008-10-31 → 2008-11-01
    Nga chart 35072 (1ST ed)
  4. HYDROLANT 1852/08 · Other2008-10-31 → 2013-02-16
    Nga chart 37166 (2ND ed)
  5. HYDROLANT 1834/08 · Nav aids2008-10-30 → 2008-11-06
    Nga chart 37028 (0 ed)
  6. HYDROLANT 1821/08 · Other2008-10-29 → 2008-10-31
    Nga chart 37055 (0 ed)
  7. HYDROLANT 1820/08 · Cable ops2008-10-29 → 2008-11-07
    Seismic survey in progress until further notice by M/V alize towing eight 5000 meter long cables in area…
  8. HYDROLANT 1817/08 · Nav aids2008-10-29 → 2008-12-13
    Nga chart 37140 (33RD ed)
  9. HYDROLANT 1809/08 · Nav aids2008-10-28 → 2008-10-29
    Nga chart 37140 (33RD ed)
  10. HYDROLANT 1807/08 · Nav aids2008-10-27 → 2008-10-28
    Nga chart 37140 (33RD ed)
  11. HYDROLANT 1805/08 · Nav aids2008-10-27 → 2008-10-28
    Nga chart 37140 (33RD ed)
  12. HYDROLANT 1766/08 · Other2008-10-22 → 2008-10-31
    Nga chart 37166 (2ND ed)
  13. HYDROLANT 1760/08 · Nav aids2008-10-21 → 2008-10-22
    Nga chart 35000 (26TH ed)
  14. HYDROLANT 1747/08 · Nav aids2008-10-19 → 2008-10-22
    Nga chart 35067 (1ST ed)
  15. HYDROLANT 1728/08 · Other2008-10-17 → 2008-12-06
    Nga chart 37058 (2ND ed)
  16. HYDROLANT 1710/08 · Nav aids2008-10-14 → 2008-10-15
    Nga chart 35001 (1ST ed)
  17. HYDROLANT 1709/08 · Other2008-10-14 → 2008-10-15
    Nga chart 35001 (1ST ed)
  18. HYDROLANT 1702/08 · Cable ops2008-10-13 → 2008-10-22
    Seismic survey in progress until further notice by M/V alize towing eight 5000 meter long cables in area…
  19. HYDROLANT 1701/08 · Surveys2008-10-13 → 2008-11-07
    Survey operations in progress until further notice by M/V geco eagle towing six 4000 meter long cables in…
  20. HYDROLANT 1683/08 · Other2008-10-10 → 2008-10-10
    Nga chart 35068 (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.