North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
6
since 1997
4,730
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%
Other66814%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,729 cancelled

  1. HYDROLANT 2896/13 · Nav aids2013-11-16 → 2013-11-20
    Cancel HYDROLANT 2707/13, aids restored
  2. HYDROLANT 2867/13 · Nav aids2013-11-13 → 2013-11-18
    Platform 49/17-GD, 53-26.8N 002-15.3E unlit
  3. HYDROLANT 2857/13 · Other2013-11-13 → 2013-11-19
    Ordnance
  4. HYDROLANT 2837/13 · Nav aids2013-11-10 → 2014-02-02
    Cancel HYDROLANT 1636/13
  5. HYDROLANT 2832/13 · Cable ops2013-11-10 → 2013-11-19
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-28.3N 003-10.6E
  6. HYDROLANT 2767/13 · Nav aids2013-11-04 → 2013-11-06
    Cancel HYDROLANT 2538/13
  7. HYDROLANT 2756/13 · Nav aids2013-11-03 → 2013-11-04
    Shetland Islands
  8. HYDROLANT 2746/13 · Cable ops2013-11-02 → 2013-11-08
    Seismic survey in progress until further notice by M/V artemis atlantic towing 8800 meter long cable in area…
  9. HYDROLANT 2707/13 · Nav aids2013-10-28 → 2013-11-16
    Southern North Sea
  10. HYDROLANT 2705/13 · Nav aids2013-10-28 → 2013-10-29
    England-southeast Coast
  11. HYDROLANT 2690/13 · Nav aids2013-10-27 → 2013-10-28
    Shetland Islands
  12. HYDROLANT 2683/13 · Nav aids2013-10-26 → 2013-10-27
    Cancel this msg 270900Z oct 13
  13. HYDROLANT 2653/13 · Nav aids2013-10-23 → 2013-10-24
    Cancel this msg 240900Z oct 13
  14. HYDROLANT 2647/13 · Cable ops2013-10-23 → 2013-11-02
    Seismic survey in progress until further notice by M/V artemis atlantic towing 8800 meter long cable in area…
  15. HYDROLANT 2622/13 · Nav aids2013-10-20 → 2013-10-22
    Shetland Islands
  16. HYDROLANT 2607/13 · Nav aids2013-10-19 → 2013-10-20
    Scotland-east Coast
  17. HYDROLANT 2592/13 · Cable ops2013-10-18 → 2013-11-24
    Seismic survey in progress until further notice by M/V atlantic explorer towing six 6500 meter long cables…
  18. HYDROLANT 2588/13 · Other2013-10-18 → 2013-11-13
    B. 49/17-GD, 53-26.8N 002-15.3E
  19. HYDROLANT 2587/13 · Other2013-10-18 → 2013-11-29
    Cancel HYDROLANT 2550/13(24)
  20. HYDROLANT 2576/13 · Nav aids2013-10-17 → 2013-11-28
    B. 53-18.8N 000-44.9E

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