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 1114/10 · Cable ops2010-06-15 → 2010-07-27
    Seismic survey in progress until further notice by M/V northern genesis towing five mile long cable in area…
  2. HYDROLANT 1104/10 · Nav aids2010-06-13 → 2010-06-21
    Nga chart 37057 (2ND ed)
  3. HYDROLANT 1097/10 · Nav aids2010-06-12 → 2010-06-13
    Nga chart 35001 (2ND ed)
  4. HYDROLANT 1056/10 · Other2010-06-08 → 2010-06-11
    Bombing exercises 1030Z to 1130Z, 1330Z to 1430Z, 1730Z to 1830Z daily 09 and 10 jun and 111015Z to 111115Z…
  5. HYDROLANT 1054/10 · Nav aids2010-06-08 → 2010-06-10
    Dgps station at flamborough head light 54-07.0N 000-04.9W off air 0800Z to 1600Z daily 08 thru 10 jun
  6. HYDROLANT 1036/10 · Nav aids2010-06-06 → 2010-06-07
    Nga chart 37120 (3RD ed)
  7. HYDROLANT 1028/10 · Nav aids2010-06-04 → 2010-06-06
    Nga chart 35072 (1ST ed)
  8. HYDROLANT 1010/10 · Cable ops2010-06-02 → 2010-09-05
    Seismic survey in progress until further notice by M/V western regent towing ten 3000 meter long cables in…
  9. HYDROLANT 981/10 · Nav aids2010-05-30 → 2010-05-31
    Nga chart 35001 (2ND ed)
  10. HYDROLANT 946/10 · Nav aids2010-05-25 → 2010-05-25
    Nga chart 35066 (1ST ed)
  11. HYDROLANT 940/10 · Nav aids2010-05-24 → 2010-05-27
    Nga chart 37120 (3RD ed)
  12. HYDROLANT 933/10 · Other2010-05-23 → 2010-05-27
    Bombing exercises 0830Z to 0930Z daily 24 thru 27 may in area bound by 55-02N 001-00W, 55-31N 001-11W,…
  13. HYDROLANT 931/10 · Cable ops2010-05-23 → 2010-05-27
    Underwater operations in progress until further notice by cableship leon thevenin along trackline between…
  14. HYDROLANT 914/10 · Wrecks2010-05-21 → 2011-07-09
    Nga chart 37028 (0 ed)
  15. HYDROLANT 890/10 · Nav aids2010-05-18 → 2010-05-20
    Nga chart 35056 (1ST ed)
  16. HYDROLANT 881/10 · Nav aids2010-05-17 → 2010-05-18
    Nga chart 35056 (1ST ed)
  17. HYDROLANT 846/10 · Nav aids2010-05-13 → 2010-05-13
    Nga chart 35063 (1ST ed)
  18. HYDROLANT 827/10 · Nav aids2010-05-11 → 2010-06-29
    Nga chart 37057 (2ND ed)
  19. HYDROLANT 818/10 · Nav aids2010-05-09 → 2010-05-11
    Nga chart 37057 (2ND ed)
  20. HYDROLANT 780/10 · Nav aids2010-05-04 → 2010-05-04
    Nga chart 37120 (3RD 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.