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 837/06 · Surveys2006-05-01 → 2006-05-12
    Underwater operations in progress until further notice by M/V noordhoek singapore with submersible along…
  2. HYDROLANT 831/06 · Other2006-04-29 → 2006-05-02
    Pipelaying operations in progress until further notice by barge tog mor vicinity 52-34N 001-53E
  3. HYDROLANT 801/06 · Other2006-04-26 → 2006-05-08
    Pipelaying operations in progress until further notice by barge tog mor with vessels along trackline between…
  4. HYDROLANT 788/06 · Cable ops2006-04-24 → 2006-05-01
    Underwater operations in progress until further notice by cableship rene descartes vicinity 59-13.7N 001-01.6E
  5. HYDROLANT 787/06 · Nav aids2006-04-24 → 2006-04-25
    Inter bank light buoy 51-16N 001-52E RACON inoperative
  6. HYDROLANT 767/06 · Other2006-04-21 → 2006-06-02
    Unexploded ordnance in 52-13.92N 002-47.60E
  7. HYDROLANT 753/06 · Other2006-04-20 → 2006-07-06
    Unexploded ordnance vicinity 54-03.41N 000-41.64E
  8. HYDROLANT 748/06 · Other2006-04-19 → 2006-06-21
    Safety zone established within 500 meters of 56-54N 002-27.1E
  9. HYDROLANT 735/06 · Surveys2006-04-14 → 2006-04-21
    Underwater operations in progress until further notice by M/V leon thevenin vicinity 51-52.5N 003-04.0E
  10. HYDROLANT 733/06 · Nav aids2006-04-14 → 2006-09-27
    Wether holm light, fl 5 sec 6 meter 9 miles, established in 60-22.34N 001-01.33W
  11. HYDROLANT 708/06 · Cable ops2006-04-11 → 2006-05-08
    Seismic survey in progress until further notice by M/V tridens one towing 600 meter long cable within two…
  12. HYDROLANT 692/06 · Nav aids2006-04-07 → 2006-04-14
    Wether holm light, fl w 5 sec 9 miles, established in 60-22.3N 001-01.3W
  13. HYDROLANT 651/06 · Nav aids2006-04-02 → 2006-04-03
    Dunkerque light 51-03.0N 002-21.9E unlit
  14. HYDROLANT 631/06 · Other2006-03-31 → 2006-04-01
    Sandettie lightship 51-09.4N 001-47.2E reported off station
  15. HYDROLANT 627/06 · Cable ops2006-03-30 → 2006-04-02
    Cable operations in progress until further notice by cableship sovereign vicinity 52-23.97N 002-36.37E
  16. HYDROLANT 626/06 · Other2006-03-30 → 2006-04-22
    Unexploded ordnance in 52-13.92N 002-47.60E
  17. HYDROLANT 617/06 · Nav aids2006-03-29 → 2006-03-30
    CS5 buoy 51-23.0N 001-49.9E missing
  18. HYDROLANT 612/06 · Cable ops2006-03-28 → 2006-03-30
    Cable operations in progress until further notice by cableship sovereign vicinity 52-24N 002-47E
  19. HYDROLANT 603/06 · Cable ops2006-03-27 → 2006-03-28
    Cable operations in progress until further notice by cableship sovereign vicinity 52-24.07N 002-45.27E
  20. HYDROLANT 591/06 · Cable ops2006-03-25 → 2006-03-27
    Submarine cable operations in progress until further notice by cableship sovereign vicinity 52-24N 002-47E

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