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 1569/12 · Cable ops2012-07-14 → 2012-08-25
    Seismic survey in progress until 312359Z oct by M/V wg tasman towing eight 4800 meter long cables in area…
  2. HYDROLANT 1554/12 · Nav aids2012-07-13 → 2012-07-16
    Cancel HYDROLANT 1522/12(24)
  3. HYDROLANT 1551/12 · Wrecks2012-07-13 → 2013-02-16
    B. 56-11.15N 002-41.33E
  4. HYDROLANT 1539/12 · Other2012-07-11 → 2012-07-16
    Cancel HYDROLANT 1463/12
  5. HYDROLANT 1521/12 · Derelicts2012-07-09 → 2012-07-10
    Derelict F/V on fire and adrift in 58-53.1N 000-54.6W at 091640Z jul
  6. HYDROLANT 1511/12 · Cable ops2012-07-09 → 2012-08-06
    Seismic survey in progress until 05 aug by M/V geco triton towing ten 2600 meter long cables in area bound…
  7. HYDROLANT 1510/12 · Other2012-07-09 → 2012-07-10
    Dover Strait
  8. HYDROLANT 1505/12 · Cable ops2012-07-07 → 2012-07-10
    Seismic survey in progress until 102300Z jul by M/V western monarch towing 13 3.75 mile long cables in area…
  9. HYDROLANT 1502/12 · Nav aids2012-07-07 → 2012-09-22
    Scotland-east Coast
  10. HYDROLANT 1491/12 · Nav aids2012-07-06 → 2013-08-24
    Scotland-east Coast
  11. HYDROLANT 1473/12 · Other2012-07-04 → 2012-07-19
    Moray Firth
  12. HYDROLANT 1463/12 · Nav aids2012-07-03 → 2012-07-11
    Cancel HYDROLANT 1345/12
  13. HYDROLANT 1446/12 · Nav aids2012-07-01 → 2012-08-16
    Southern North Sea
  14. HYDROLANT 1429/12 · Nav aids2012-06-30 → 2012-07-02
    Orkney Islands
  15. HYDROLANT 1427/12 · Surveys2012-06-29 → 2012-07-09
    Underwater operations in progress until further notice by M/V highland eagle within 1000 meters of 56-46.9N…
  16. HYDROLANT 1409/12 · Nav aids2012-06-28 → 2012-06-28
    Stirling dgps station 56-04.3N 004-03.6W off air 280930Z to 281530Z jun
  17. HYDROLANT 1407/12 · Nav aids2012-06-28 → 2012-07-07
    Orkney Islands
  18. HYDROLANT 1400/12 · Nav aids2012-06-27 → 2012-08-01
    Southern North Sea
  19. HYDROLANT 1389/12 · Nav aids2012-06-26 → 2012-06-27
    Orkney Islands
  20. HYDROLANT 1383/12 · Cable ops2012-06-25 → 2012-07-14
    Seismic survey in progress until further notice by M/V polarcus samur in area bound by 56-04N 000-51E,…

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