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 2264/13 · Cable ops2013-09-15 → 2013-09-23
    Seismic survey in progress until further notice by M/V ramform valiant towing 12 four mile long cables in…
  2. HYDROLANT 2263/13 · Nav aids2013-09-15 → 2013-09-20
    Southern North Sea
  3. HYDROLANT 2232/13 · Cable ops2013-09-12 → 2013-09-14
    Underwater operations in progress until further notice by cableship ile de aix vicinity 58-47.2N 002-47.0W
  4. HYDROLANT 2227/13 · Nav aids2013-09-11 → 2013-10-11
    Shetland Islands
  5. HYDROLANT 2222/13 · Nav aids2013-09-11 → 2013-10-23
    Southern North Sea
  6. HYDROLANT 2211/13 · Nav aids2013-09-10 → 2013-09-10
    Shetland Islands
  7. HYDROLANT 2198/13 · Cable ops2013-09-08 → 2013-09-17
    Seismic survey in progress until further notice by M/V harrier explorer towing 4.6 mile long cable in area…
  8. HYDROLANT 2186/13 · Other2013-09-07 → 2013-10-18
    B. 49/17-GD, 53-26.8N 002-15.3E
  9. HYDROLANT 2141/13 · Debris2013-09-02 → 2013-09-03
    Eight ton, eight meter long, black and yellow object adrift in 56-35N 004-43E at 020700Z sep
  10. HYDROLANT 2134/13 · Cable ops2013-09-02 → 2013-09-05
    Underwater operations in progress until further notice by cableship raymond croze with submersible vicinity…
  11. HYDROLANT 2124/13 · Nav aids2013-08-31 → 2013-09-01
    Southern North Sea
  12. HYDROLANT 2122/13 · Cable ops2013-08-31 → 2013-11-19
    Seismic survey in progress until further notice by M/V pacific explorer towing six 6400 meter long cables in…
  13. HYDROLANT 2107/13 · Cable ops2013-08-30 → 2013-09-15
    Seismic survey in progress until further notice by M/V ramform valiant towing 12 4.6 mile long cables in…
  14. HYDROLANT 2079/13 · Nav aids2013-08-26 → 2013-08-27
    Scotland-east Coast
  15. HYDROLANT 2070/13 · Cable ops2013-08-24 → 2013-09-01
    Underwater operations in progress until further notice by cableship raymond croze with submersible vicinity…
  16. HYDROLANT 2063/13 · Nav aids2013-08-23 → 2013-08-30
    Cancel HYDROLANT 1868/13
  17. HYDROLANT 2038/13 · Cable ops2013-08-20 → 2013-08-24
    Underwater operations in progress until further notice by cableship raymond croze with submersible along…
  18. HYDROLANT 2002/13 · Cable ops2013-08-16 → 2013-09-04
    Seismic survey in progress until further notice by M/V polarcus nadia towing eight four mile long cables in…
  19. HYDROLANT 1990/13 · Nav aids2013-08-14 → 2013-10-19
    Scotland-east Coast
  20. HYDROLANT 1986/13 · Nav aids2013-08-14 → 2013-08-14
    Cancel this msg 141800Z aug 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.