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 2093/12 · Other2012-09-09 → 2012-09-12
    Bombing exercises 1030Z to 1230Z daily 10 thru 13 sep in area bound by 55-31N 001-11W, 55-38N 000-38W,…
  2. HYDROLANT 2083/12 · Nav aids2012-09-08 → 2012-12-02
    Cancel HYDROLANT 1711/12
  3. HYDROLANT 2062/12 · Nav aids2012-09-06 → 2012-09-09
    Southern North Sea
  4. HYDROLANT 2055/12 · Nav aids2012-09-06 → 2012-09-06
    Scotland-southeast Coast
  5. HYDROLANT 2025/12 · Cable ops2012-09-03 → 2012-09-08
    Cable operations in progress until further notice by cableship rene descartes with submersible within one…
  6. HYDROLANT 1986/12 · Other2012-08-29 → 2012-10-10
    Cancel HYDROLANT 1217/12
  7. HYDROLANT 1984/12 · Nav aids2012-08-29 → 2012-08-29
    Scotland-east Coast
  8. HYDROLANT 1983/12 · Nav aids2012-08-29 → 2012-09-23
    Southern North Sea
  9. HYDROLANT 1978/12 · Nav aids2012-08-28 → 2012-08-29
    Pentland Firth
  10. HYDROLANT 1912/12 · Nav aids2012-08-19 → 2012-10-08
    Southern North Sea
  11. HYDROLANT 1911/12 · Nav aids2012-08-19 → 2012-08-22
    Pentland Firth
  12. HYDROLANT 1898/12 · Nav aids2012-08-17 → 2012-08-20
    Scotland-east Coast
  13. HYDROLANT 1893/12 · Nav aids2012-08-17 → 2012-08-17
    Cancel HYDROLANT 1888/12(36)
  14. HYDROLANT 1890/12 · Cable ops2012-08-17 → 2012-08-19
    Seismic survey in progress until 190001Z aug by M/V wg amundsen towing 3600 meter long cables bearing 170…
  15. HYDROLANT 1887/12 · Nav aids2012-08-16 → 2012-08-17
    Pentland Firth
  16. HYDROLANT 1879/12 · Cable ops2012-08-15 → 2012-10-23
    Seismic survey in progress until further notice by M/V srv vantage towing eight 2.5 mile long cables in area…
  17. HYDROLANT 1865/12 · Nav aids2012-08-14 → 2012-08-14
    Mrcc humber mf dsc and r/t services at cullercoats 55-04N 001-28W off air
  18. HYDROLANT 1864/12 · Cable ops2012-08-14 → 2012-08-15
    Seismic survey in progress until further notice by M/V oceanic challenger towing six 3000 meter long cables…
  19. HYDROLANT 1859/12 · Nav aids2012-08-13 → 2012-08-17
    Southern North Sea
  20. HYDROLANT 1848/12 · Nav aids2012-08-12 → 2012-11-04
    Cancel HYDROLANT 1446/12

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