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
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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 1237/14 · Nav aids2014-05-15 → 2014-05-15
    England-southeast Coast
  2. HYDROLANT 1236/14 · Other2014-05-15 → 2014-05-19
    Wide berth requested
  3. HYDROLANT 1226/14 · Other2014-05-14 → 2015-04-02
    Southern North Sea
  4. HYDROLANT 1225/14 · Nav aids2014-05-14 → 2014-05-14
    Scotland-east Coast
  5. HYDROLANT 1217/14 · Nav aids2014-05-13 → 2014-05-14
    Orkney Islands
  6. HYDROLANT 1193/14 · Cable ops2014-05-11 → 2014-05-17
    Underwater operations in progress until further notice by cableship raymond croze with submersible vicinity…
  7. HYDROLANT 1192/14 · Cable ops2014-05-11 → 2014-06-07
    Seismic survey in progress until 20 jun by M/V wg amundsen towing 11 5000 meter long cables in area bound by…
  8. HYDROLANT 1176/14 · Nav aids2014-05-09 → 2014-05-14
    Cancel this msg 141700Z may 14
  9. HYDROLANT 1155/14 · Cable ops2014-05-06 → 2014-05-10
    Underwater operations in progress until further notice by cableship ile de aix vicinity of trackline between…
  10. HYDROLANT 1154/14 · Cable ops2014-05-06 → 2014-05-06
    Underwater operations in progress until further notice by cableship ile de aix vicinity 54-11.4N 000-07.9W
  11. HYDROLANT 1136/14 · Nav aids2014-05-04 → 2014-05-05
    North Sea
  12. HYDROLANT 1134/14 · Nav aids2014-05-04 → 2014-05-04
    Mrcc aberdeen mf r/t and dsc services at greg ness 57-08N 002-03W off air
  13. HYDROLANT 1100/14 · Nav aids2014-04-27 → 2014-05-08
    B. 49/5A ST-1, 53-50.5N 002-52.1E
  14. HYDROLANT 1096/14 · Nav aids2014-04-27 → 2014-06-08
    Cancel HYDROLANT 321/14
  15. HYDROLANT 1080/14 · Other2014-04-24 → 2014-06-04
    Pipelaying operations in progress until further notice by M/V saipem castoro sei vicinity of trackline…
  16. HYDROLANT 1074/14 · Nav aids2014-04-23 → 2014-05-20
    England-east Coast
  17. HYDROLANT 1066/14 · Other2014-04-22 → 2014-04-25
    Survey equipment and 79 meter long cable adrift vicinity 53-15.9N 001-22.7E
  18. HYDROLANT 1065/14 · Nav aids2014-04-22 → 2014-06-09
    B. 49/17-DD, 53-26.4N 002-23.6E
  19. HYDROLANT 1052/14 · Nav aids2014-04-19 → 2014-04-22
    Southern North Sea
  20. HYDROLANT 1023/14 · Nav aids2014-04-16 → 2014-04-22
    B. 49/17-DD, 53-26.4N 002-23.6E

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