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 1845/12 · Cable ops2012-08-11 → 2012-08-14
    Seismic survey in progress until further notice by M/V oceanic challenger towing six 3000 meter long cables…
  2. HYDROLANT 1818/12 · Nav aids2012-08-08 → 2012-08-09
    England-southeast Coast
  3. HYDROLANT 1801/12 · Cable ops2012-08-06 → 2012-10-13
    Seismic survey in progress until further notice by M/V geco triton towing ten 4100 meter long cables in area…
  4. HYDROLANT 1798/12 · Nav aids2012-08-05 → 2012-08-06
    England-southeast Coast
  5. HYDROLANT 1768/12 · Cable ops2012-08-02 → 2012-09-09
    Seismic survey in progress until further notice by M/V western pride towing eight 2.5 mile long cables in…
  6. HYDROLANT 1760/12 · Other2012-08-01 → 2012-08-05
    North Sea
  7. HYDROLANT 1752/12 · Nav aids2012-08-01 → 2012-10-24
    Southern North Sea
  8. HYDROLANT 1747/12 · Nav aids2012-08-01 → 2012-08-04
    Pentland Firth
  9. HYDROLANT 1745/12 · Nav aids2012-07-31 → 2012-08-01
    Abbs head light 55-55.0N 002-08.2W unreliable
  10. HYDROLANT 1733/12 · Other2012-07-30 → 2012-09-04
    Cancel HYDROLANT 1318/12
  11. HYDROLANT 1711/12 · Nav aids2012-07-28 → 2012-09-08
    Cancel HYDROLANT 1299/12
  12. HYDROLANT 1674/12 · Cable ops2012-07-24 → 2012-08-11
    Seismic survey in progress until further notice by M/V oceanic challenger towing seven 3000 meter long…
  13. HYDROLANT 1669/12 · Nav aids2012-07-23 → 2012-07-26
    Cancel this msg 261700Z jul 12
  14. HYDROLANT 1661/12 · Cable ops2012-07-22 → 2012-09-24
    Seismic survey in progress until further notice by M/V geo caspian towing 12 6300 meter long cables in area…
  15. HYDROLANT 1646/12 · Cable ops2012-07-20 → 2012-09-15
    Seismic survey in progress until 150100Z sep notice by M/V cgg symphony towing ten 6000 meter long cables in…
  16. HYDROLANT 1643/12 · Cable ops2012-07-20 → 2012-07-20
    Seismic survey in progress until 201900Z jul notice by M/V cgg symphony towing ten 6000 meter long cables in…
  17. HYDROLANT 1625/12 · Nav aids2012-07-18 → 2012-07-19
    Cancel this msg 191400Z jul 12
  18. HYDROLANT 1624/12 · Nav aids2012-07-18 → 2012-07-21
    Orkney Islands
  19. HYDROLANT 1617/12 · Nav aids2012-07-18 → 2012-07-18
    Cancel HYDROLANT 1608/12
  20. HYDROLANT 1608/12 · Nav aids2012-07-17 → 2012-07-18
    Orkney Islands

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