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 2197/08 · Nav aids2008-12-18 → 2008-12-19
    Nga chart 37120 (3RD ed)
  2. HYDROLANT 2190/08 · Other2008-12-18 → 2008-12-18
    Nga chart 35018 (1ST ed)
  3. HYDROLANT 2172/08 · Nav aids2008-12-16 → 2008-12-19
    Nga chart 37059 (0 ed)
  4. HYDROLANT 2150/08 · Nav aids2008-12-13 → 2008-12-17
    Nga chart 37058 (2ND ed)
  5. HYDROLANT 2130/08 · Nav aids2008-12-11 → 2008-12-12
    Dsc station gregness 57-08N 002-03W off air
  6. HYDROLANT 2112/08 · Nav aids2008-12-08 → 2008-12-18
    Nga chart 37120 (3RD ed)
  7. HYDROLANT 2108/08 · Other2008-12-07 → 2008-12-08
    Nga chart 37120 (3RD ed)
  8. HYDROLANT 2098/08 · Other2008-12-05 → 2008-12-06
    70 meter long steel pipe adrift vicinity 54-35.2N 001-25.7E
  9. HYDROLANT 2089/08 · Nav aids2008-12-04 → 2009-01-15
    Nga chart 37056 (1ST ed)
  10. HYDROLANT 2084/08 · Cable ops2008-12-04 → 2008-12-23
    Submarine cable operations in progress until further notice by barge eide 28 along trackline between…
  11. HYDROLANT 2077/08 · Nav aids2008-12-03 → 2009-02-21
    Nga chart 37053 (1ST ed)
  12. HYDROLANT 2048/08 · Cable ops2008-11-26 → 2008-12-08
    Underwater operations in progress until further notice by cableship sovereign along trackline joining…
  13. HYDROLANT 2038/08 · Nav aids2008-11-25 → 2008-11-25
    Nga chart 35006 (1ST ed)
  14. HYDROLANT 2017/08 · Nav aids2008-11-22 → 2008-11-23
    Nga chart 35068 (1ST ed)
  15. HYDROLANT 2015/08 · Nav aids2008-11-22 → 2008-11-24
    Nga chart 35006 (1ST ed)
  16. HYDROLANT 1953/08 · Nav aids2008-11-13 → 2008-11-14
    Nga chart 35063 (1ST ed)
  17. HYDROLANT 1934/08 · Cable ops2008-11-11 → 2008-11-19
    Underwater operations in progress until further notice by cableship sovereign along trackline joining…
  18. HYDROLANT 1904/08 · Cable ops2008-11-06 → 2008-11-07
    Underwater operations in progress until further notice by cableship sovereign along trackline joining…
  19. HYDROLANT 1902/08 · Nav aids2008-11-06 → 2008-12-20
    Nga chart 37120 (3RD ed)
  20. HYDROLANT 1875/08 · Nav aids2008-11-03 → 2008-11-05
    Nga chart 35059 (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.