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 2206/11 · Nav aids2011-12-20 → 2011-12-22
    Nga chart 35058 (1ST ed)
  2. HYDROLANT 2191/11 · Nav aids2011-12-18 → 2011-12-21
    Nga chart 35056 (1ST ed)
  3. HYDROLANT 2188/11 · Nav aids2011-12-17 → 2011-12-19
    Nga chart 37028 (2ND ed)
  4. HYDROLANT 2184/11 · Nav aids2011-12-17 → 2011-12-18
    Nga chart 35056 (1ST ed)
  5. HYDROLANT 2183/11 · Nav aids2011-12-17 → 2011-12-18
    Nga chart 35056 (1ST ed)
  6. HYDROLANT 2163/11 · Other2011-12-15 → 2011-12-17
    Nga chart 35056 (1ST ed)
  7. HYDROLANT 2160/11 · Cable ops2011-12-15 → 2011-12-15
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-32N 002-13E
  8. HYDROLANT 2148/11 · Nav aids2011-12-13 → 2011-12-14
    Nga chart 35050 (1ST ed)
  9. HYDROLANT 2142/11 · Other2011-12-13 → 2011-12-17
    Nga chart 37028 (27TH ed)
  10. HYDROLANT 2141/11 · Other2011-12-13 → 2011-12-19
    Nga chart 37140 (33RD ed)
  11. HYDROLANT 2131/11 · Cable ops2011-12-11 → 2011-12-13
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-32N 002-13E
  12. HYDROLANT 2118/11 · Nav aids2011-12-10 → 2012-01-21
    Nga chart 37166 (2ND ed)
  13. HYDROLANT 2103/11 · Nav aids2011-12-09 → 2011-12-12
    Nga chart 35072 (1ST ed)
  14. HYDROLANT 2102/11 · Nav aids2011-12-09 → 2011-12-12
    Nga chart 35058 (1ST ed)
  15. HYDROLANT 2101/11 · Nav aids2011-12-09 → 2011-12-19
    Nga chart 37140 (33RD ed)
  16. HYDROLANT 2085/11 · Nav aids2011-12-08 → 2011-12-11
    Nga chart 35001 (1ST ed)
  17. HYDROLANT 2077/11 · Nav aids2011-12-07 → 2012-01-08
    Nga chart 37057 (2ND ed)
  18. HYDROLANT 2073/11 · Nav aids2011-12-07 → 2012-01-18
    Nga chart 37166 (2ND ed)
  19. HYDROLANT 2068/11 · Nav aids2011-12-06 → 2011-12-07
    Nga chart 37166 (2ND ed)
  20. HYDROLANT 2066/11 · Nav aids2011-12-06 → 2011-12-11
    Mrcc shetland 60-09N 001-08W mf r/t off air

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