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 1354/11 · Nav aids2011-08-24 → 2011-08-25
    Nga chart 35001(1ST ed)
  2. HYDROLANT 1331/11 · Other2011-08-22 → 2015-04-02
    Nga chart 37166 (2ND ed)
  3. HYDROLANT 1319/11 · Other2011-08-19 → 2011-09-10
    Nga chart 37005 (16TH ed)
  4. HYDROLANT 1292/11 · Other2011-08-15 → 2011-08-19
    Nga chart 37005 (16TH ed)
  5. HYDROLANT 1291/11 · Other2011-08-15 → 2015-04-02
    Nga chart 37166 (3RD ed)
  6. HYDROLANT 1289/11 · Nav aids2011-08-14 → 2011-08-16
    Nga chart 35013 (3RD ed)
  7. HYDROLANT 1282/11 · Cable ops2011-08-13 → 2011-08-16
    Underwater operations in progress until further notice by cableship leon thevenin with submersible vicinity…
  8. HYDROLANT 1272/11 · Nav aids2011-08-11 → 2011-08-11
    Nga chart 35063 (1ST ed)
  9. HYDROLANT 1257/11 · Nav aids2011-08-09 → 2011-08-10
    Nga chart 37050 (1ST ed)
  10. HYDROLANT 1248/11 · Nav aids2011-08-08 → 2011-08-22
    Nga chart 37057 (2ND ed)
  11. HYDROLANT 1227/11 · Other2011-08-03 → 2011-08-05
    Nga chart 35005 (1ST ed)
  12. HYDROLANT 1213/11 · Other2011-07-31 → 2011-08-03
    Nga chart 35005 (1ST ed)
  13. HYDROLANT 1203/11 · Other2011-07-29 → 2011-07-29
    Nga chart 35005 (1ST ed)
  14. HYDROLANT 1182/11 · Nav aids2011-07-26 → 2011-07-27
    Nga chart 35172 (2ND ed)
  15. HYDROLANT 1177/11 · Nav aids2011-07-25 → 2011-07-27
    Nga chart 35058 (1ST ed)
  16. HYDROLANT 1175/11 · Nav aids2011-07-25 → 2011-07-25
    Nga chart 35063 (1ST ed)
  17. HYDROLANT 1163/11 · Cable ops2011-07-21 → 2011-08-24
    Seismic survey in progress until further notice by M/V western regent towing ten 3000 meter long cables in…
  18. HYDROLANT 1161/11 · Other2011-07-21 → 2011-09-10
    Nga chart 37165 (3RD ed)
  19. HYDROLANT 1145/11 · Nav aids2011-07-15 → 2011-07-26
    Nga chart 35172 (2ND ed)
  20. HYDROLANT 1144/11 · Cable ops2011-07-15 → 2011-10-10
    Seismic survey in progress until 102259Z oct by M/V geco triton towing eight 5200 meter long cables in area…

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