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 89/14 · Nav aids2014-01-09 → 2014-01-10
    England-southeast Coast
  2. HYDROLANT 85/14 · Nav aids2014-01-09 → 2014-01-10
    Southern North Sea
  3. HYDROLANT 81/14 · Nav aids2014-01-08 → 2014-01-10
    Cancel HYDROLANT 73/14
  4. HYDROLANT 79/14 · Nav aids2014-01-08 → 2014-01-09
    England-southeast Coast
  5. HYDROLANT 73/14 · Cable ops2014-01-08 → 2014-01-08
    Underwater operations in progress until further notice by cableship ile de aix vicinity 58-50.3N 002-51.9W
  6. HYDROLANT 43/14 · Nav aids2014-01-06 → 2014-01-11
    Platform 49/17-DD, 53-26.4N 002-23.6E lights unreliable
  7. HYDROLANT 37/14 · Nav aids2014-01-05 → 2014-01-06
    Platform 49/17-GD, 53-26.8N 002-15.3E unlit
  8. HYDROLANT 29/14 · Nav aids2014-01-04 → 2014-01-04
    Shetland Islands
  9. HYDROLANT 23/14 · Cable ops2014-01-03 → 2014-02-14
    Seismic survey in progress until further notice by M/V harrier explorer and M/V seabed prince with…
  10. HYDROLANT 3375/13 · Cable ops2013-12-29 → 2014-01-03
    Seismic survey in progress until further notice by M/V harrier explorer with submersible in area bound by…
  11. HYDROLANT 3359/13 · Nav aids2013-12-27 → 2014-01-05
    Southern North Sea
  12. HYDROLANT 3352/13 · Nav aids2013-12-26 → 2013-12-29
    Southern North Sea
  13. HYDROLANT 3334/13 · Nav aids2013-12-24 → 2013-12-25
    Dover Strait
  14. HYDROLANT 3332/13 · Nav aids2013-12-24 → 2013-12-25
    Dover Strait
  15. HYDROLANT 3318/13 · Nav aids2013-12-23 → 2013-12-27
    North Sea
  16. HYDROLANT 3314/13 · Nav aids2013-12-22 → 2013-12-23
    Mrcc shetland mf r/t and dsc services 60-09N 001-08W off air
  17. HYDROLANT 3281/13 · Nav aids2013-12-19 → 2013-12-20
    Orkney Islands
  18. HYDROLANT 3270/13 · Nav aids2013-12-18 → 2013-12-19
    Shetland Islands
  19. HYDROLANT 3269/13 · Nav aids2013-12-18 → 2013-12-19
    Orkney Islands
  20. HYDROLANT 3205/13 · Nav aids2013-12-11 → 2013-12-17
    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.