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 1085/13 · Nav aids2013-04-30 → 2013-05-04
    Southern North Sea
  2. HYDROLANT 1082/13 · Other2013-04-30 → 2013-05-11
    Mrcc yarmouth 52-36.4N 001-43.4E discontinued 011350Z may
  3. HYDROLANT 1079/13 · Nav aids2013-04-30 → 2013-04-30
    Mrcc yarmouth 52-36.4N 001-43.4E off air 011350Z may
  4. HYDROLANT 1074/13 · Nav aids2013-04-29 → 2013-06-04
    Cancel HYDROLANT 677/13
  5. HYDROLANT 1047/13 · Other2013-04-26 → 2013-05-19
    B. 49/17-GD 53-26.8N 002-15.3E
  6. HYDROLANT 1035/13 · Nav aids2013-04-25 → 2013-05-01
    England-east Coast
  7. HYDROLANT 1027/13 · Nav aids2013-04-24 → 2013-04-25
    Cancel HYDROLANT 1019/13(57)
  8. HYDROLANT 1008/13 · Cable ops2013-04-22 → 2013-06-07
    Seismic survey in progress until further notice by M/V polarcus nadia towing eight 7000 meter long cables in…
  9. HYDROLANT 972/13 · Nav aids2013-04-18 → 2013-04-19
    Dover Strait
  10. HYDROLANT 965/13 · Nav aids2013-04-17 → 2013-04-17
    Orkney Islands
  11. HYDROLANT 945/13 · Nav aids2013-04-14 → 2013-07-07
    Cancel HYDROLANT 182/13
  12. HYDROLANT 899/13 · Nav aids2013-04-11 → 2013-04-12
    England-east Coast
  13. HYDROLANT 892/13 · Nav aids2013-04-09 → 2013-04-11
    Mrcc shetland mf r/t and dsc services at lerwick 60-09N 001-08W off air
  14. HYDROLANT 875/13 · Cable ops2013-04-07 → 2013-05-29
    Seismic survey in progress until further notice by M/V atlantic explorer towing six 6000 meter long cables…
  15. HYDROLANT 858/13 · Cable ops2013-04-04 → 2013-06-17
    Seismic survey in progress until further notice by M/V polar duke towing ten 2400 meter long cables in area…
  16. HYDROLANT 857/13 · Nav aids2013-04-04 → 2015-04-09
    Scotland-east Coast
  17. HYDROLANT 823/13 · Nav aids2013-03-31 → 2013-04-01
    Cancel HYDROLANT 814/13
  18. HYDROLANT 814/13 · Nav aids2013-03-30 → 2013-03-31
    Cancel HYDROLANT 812/13
  19. HYDROLANT 812/13 · Nav aids2013-03-30 → 2013-03-30
    England-east Coast
  20. HYDROLANT 810/13 · Nav aids2013-03-30 → 2013-04-03
    Southern North Sea

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