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 1364/13 · Exercises2013-06-02 → 2013-06-06
    Hazardous operations
  2. HYDROLANT 1359/13 · Cable ops2013-06-01 → 2013-06-04
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-48.9N 003-10.9E
  3. HYDROLANT 1329/13 · Nav aids2013-05-29 → 2013-06-04
    Moray Firth
  4. HYDROLANT 1322/13 · Nav aids2013-05-29 → 2013-05-29
    Orkney Islands
  5. HYDROLANT 1321/13 · Nav aids2013-05-29 → 2013-05-31
    England-northeast Coast
  6. HYDROLANT 1318/13 · Nav aids2013-05-29 → 2013-06-04
    Cancel this msg 041800Z jun 13
  7. HYDROLANT 1316/13 · Cable ops2013-05-28 → 2013-06-01
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-51.1N 002-59.4E
  8. HYDROLANT 1291/13 · Other2013-05-25 → 2013-07-06
    Southern North Sea
  9. HYDROLANT 1275/13 · Debris2013-05-24 → 2013-05-27
    Nine meter long object adrift vicinity 56-20.1N 002-41.9E at 240025Z may
  10. HYDROLANT 1241/13 · Other2013-05-19 → 2013-06-03
    B. 49/17-DD 53-26.4N 002-23.6E
  11. HYDROLANT 1240/13 · Other2013-05-19 → 2013-05-19
    B. 49/17-DD 53-26.4N 002-23.5E
  12. HYDROLANT 1230/13 · Nav aids2013-05-17 → 2015-07-06
    Cancel HYDROLANT 1208/13 and 1215/13(GEN)
  13. HYDROLANT 1208/13 · Nav aids2013-05-14 → 2013-05-17
    Cancel HYDROLANT 1200/13
  14. HYDROLANT 1200/13 · Other2013-05-13 → 2013-05-14
    Southern North Sea
  15. HYDROLANT 1157/13 · Nav aids2013-05-09 → 2013-05-09
    Mrcc humber 54-05.6N 000-10.5W mf dsc services unreliable 090900Z to 091200Z may
  16. HYDROLANT 1151/13 · Nav aids2013-05-08 → 2015-07-06
    Cancel HYDROLANT 1149/13
  17. HYDROLANT 1149/13 · Other2013-05-08 → 2013-05-08
    Southern North Sea
  18. HYDROLANT 1145/13 · Nav aids2013-05-08 → 2013-06-04
    Scotland-east Coast
  19. HYDROLANT 1105/13 · Cable ops2013-05-03 → 2013-07-10
    Seismic survey in progress until further notice by M/V artemis arctic towing six 4500 meter long cables in…
  20. HYDROLANT 1094/13 · Nav aids2013-05-01 → 2013-05-19
    Cancel HYDROLANT 702/13

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