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 1919/14 · Nav aids2014-08-11 → 2014-08-12
    Dover Strait
  2. HYDROLANT 1896/14 · Cable ops2014-08-07 → 2014-08-16
    Seismic survey in progress until further notice by M/V wg tasman towing eight 5200 meter long cables in area…
  3. HYDROLANT 1893/14 · Nav aids2014-08-07 → 2014-08-08
    Scotland-north Coast
  4. HYDROLANT 1879/14 · Nav aids2014-08-04 → 2014-08-05
    Shetland Islands
  5. HYDROLANT 1878/14 · Nav aids2014-08-04 → 2014-08-06
    Cancel this msg 061300Z aug 14
  6. HYDROLANT 1873/14 · Cable ops2014-08-04 → 2014-08-09
    Underwater operations in progress until further notice by cableship raymond croze with submersible vicinity…
  7. HYDROLANT 1867/14 · Nav aids2014-08-02 → 2015-04-02
    Scotland-east Coast
  8. HYDROLANT 1837/14 · Cable ops2014-07-29 → 2014-10-26
    Seismic survey in progress until further notice by M/V wg amundsen towing eight 6000 meter long cables in…
  9. HYDROLANT 1830/14 · Cable ops2014-07-29 → 2014-07-29
    Seismic survey in progress until further notice by M/V wg amundsen towing eight 6000 meter long cables in…
  10. HYDROLANT 1816/14 · Nav aids2014-07-26 → 2014-07-27
    Cancel HYDROLANT 1813/14
  11. HYDROLANT 1813/14 · Nav aids2014-07-25 → 2014-07-26
    Orkney Islands
  12. HYDROLANT 1799/14 · Cable ops2014-07-24 → 2014-07-25
    Underwater operations in progress until further notice by cableship ile de batz vicinity 54-49N 000-24E
  13. HYDROLANT 1795/14 · Nav aids2014-07-24 → 2014-09-04
    Cancel HYDROLANT 1434/14
  14. HYDROLANT 1790/14 · Nav aids2014-07-24 → 2014-07-24
    Orkney Islands
  15. HYDROLANT 1789/14 · Nav aids2014-07-24 → 2014-09-04
    B. 49/12-AR, 53-32.1N 002-15.2E
  16. HYDROLANT 1777/14 · Nav aids2014-07-22 → 2014-09-02
    Cancel HYDROLANT 1617/14
  17. HYDROLANT 1772/14 · Nav aids2014-07-22 → 2014-07-24
    Cancel this msg 241700Z jul 14
  18. HYDROLANT 1766/14 · Nav aids2014-07-21 → 2014-07-28
    England-east Coast
  19. HYDROLANT 1752/14 · Surveys2014-07-19 → 2014-07-23
    Underwater operations in progress until further notice by M/V rene descartes vicinity of trackline joining…
  20. HYDROLANT 1733/14 · Nav aids2014-07-16 → 2014-11-17
    NAVTEX station den helder 52-05.7N 004-15.5E unreliable

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