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 1620/15 · Cable ops2015-07-03 → 2015-09-24
    Seismic survey in progress until further notice by M/V oceanic challenger towing ten 9000 meter long cables…
  2. HYDROLANT 1585/15 · Surveys2015-06-28 → 2015-07-06
    Underwater operations in progress until further notice by M/V kommandor with submersible vicinity of…
  3. HYDROLANT 1538/15 · Other2015-06-22 → 2015-08-03
    All navigational aids at platforms inoperative: a. 49/17-DD, 53-26.4N 002-23.1E
  4. HYDROLANT 1523/15 · Surveys2015-06-21 → 2015-06-28
    Underwater operations in progress until further notice by M/V kommandor with submersible vicinity of…
  5. HYDROLANT 1521/15 · Nav aids2015-06-21 → 2015-06-22
    All navigational aids at platform 49/17-DD, 53-26.4N 002-23.1E inoperative
  6. HYDROLANT 1493/15 · Nav aids2015-06-19 → 2015-06-19
    Duncansby head light 58-38.6N 003-01.5W unreliable
  7. HYDROLANT 1485/15 · Nav aids2015-06-18 → 2015-06-18
    Stirling dgps station 56-04N 004-04W off air 181000Z to 181200Z jun
  8. HYDROLANT 1467/15 · Other2015-06-15 → 2017-01-27
    Navigation prohibited within 500 meters of 56-11.15N 002-41.33E
  9. HYDROLANT 1420/15 · Nav aids2015-06-11 → 2015-06-11
    Stirling dgps station 56-04N 004-04W off air 110800Z to 111700Z jun
  10. HYDROLANT 1409/15 · Nav aids2015-06-09 → 2015-07-08
    All navigational aids at platform 49/12-AR, 53-32.0N 002-15.3E inoperative
  11. HYDROLANT 1407/15 · Other2015-06-09 → 2015-06-21
    All navigational aids at platforms inoperative: a. 49/17-CD, 53-25.4N 002-22.5E
  12. HYDROLANT 1401/15 · Nav aids2015-06-09 → 2015-06-12
    Dgps station at flamborough head light 54-07.0N 000-04.9W off air 0800Z to 1600Z daily 09 thru 12 jun
  13. HYDROLANT 1386/15 · Cable ops2015-06-07 → 2015-07-20
    Seismic survey in progress until further notice by M/V ramform challenger towing 12 7500 meter long cables…
  14. HYDROLANT 1340/15 · Nav aids2015-06-02 → 2015-06-04
    All navigational aids at platform 49/17-GD, 53-26.9N 002-15.4E inoperative
  15. HYDROLANT 1333/15 · Other2015-06-01 → 2017-01-27
    Navigation prohibited within 500 meters of: a. 56-44.55N 000-40.61E
  16. HYDROLANT 1330/15 · Other2015-06-01 → 2015-06-30
    Mrcc thames 51-51.2N 001-16.9E will close at 051600Z jun
  17. HYDROLANT 1317/15 · Nav aids2015-05-30 → 2015-05-31
    All navigational aids at platform 49/12-AR, 53-32.1N 002-15.4E inoperative
  18. HYDROLANT 1291/15 · Other2015-05-27 → 2017-01-27
    Navigation prohibited within 500 meters of: a. 56-32.35N 002-34.47E
  19. HYDROLANT 1290/15 · Nav aids2015-05-27 → 2015-05-27
    Kinnairds head light 57-41.9N 002-00.2W unreliable
  20. HYDROLANT 1248/15 · Nav aids2015-05-21 → 2015-05-22
    Longstone lightship 55-39.4N 001-34.7W unlit

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