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 2574/15 · Nav aids2015-10-15 → 2015-11-04
    All navigational aids at platform 49/17-CD, 53-25.4N 002-22.5E inoperative
  2. HYDROLANT 2558/15 · Nav aids2015-10-14 → 2015-10-15
    Hoo stack light 60-15.0N 001-05.2W unlit
  3. HYDROLANT 2554/15 · Other2015-10-13 → 2015-10-15
    All navigational aids at platforms inoperative: a. 49/12-AR, 53-32.0N 002-15.2E
  4. HYDROLANT 2533/15 · Nav aids2015-10-11 → 2015-10-13
    All navigational aids at platform 49/17-CD, 53-25.4N 002-22.5E inoperative
  5. HYDROLANT 2513/15 · Other2015-10-08 → 2015-10-12
    All navigational aids at meteorological mast 53-10.65N 002-59.10E inoperative
  6. HYDROLANT 2511/15 · Nav aids2015-10-08 → 2015-10-11
    All navigational aids at platform 49/16, 53-23.2N 002-08.9E inoperative
  7. HYDROLANT 2508/15 · Cable ops2015-10-07 → 2015-10-12
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  8. HYDROLANT 2501/15 · Debris2015-10-06 → 2015-10-09
    20 meter long object adrift in 54-42.80N 001-06.92W
  9. HYDROLANT 2494/15 · Cable ops2015-10-05 → 2015-10-07
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  10. HYDROLANT 2489/15 · Other2015-10-05 → 2015-10-11
    All navigational aids at platforms inoperative: a. 49/17-CD, 53-25.4N 002-22.5E
  11. HYDROLANT 2485/15 · Nav aids2015-10-04 → 2015-11-15
    Fog signal at platform 42/30-A, 54-01.8N 000-58.0E inoperative
  12. HYDROLANT 2478/15 · Cable ops2015-10-03 → 2015-10-05
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  13. HYDROLANT 2459/15 · Wrecks2015-10-02 → 2015-11-06
    Obstruction, 16.6 meters above seabed, in 53-30.82N 000-44.11E
  14. HYDROLANT 2450/15 · Cable ops2015-10-01 → 2015-10-03
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  15. HYDROLANT 2442/15 · Nav aids2015-09-30 → 2015-10-02
    All navigational aids at platform 12/21C jacky, 58-11.0N 002-58.8W inoperative
  16. HYDROLANT 2440/15 · Other2015-09-30 → 2017-01-27
    Navigation prohibited within 500 meters of 57-53.90N 000-40.83W
  17. HYDROLANT 2424/15 · Cable ops2015-09-28 → 2015-10-01
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  18. HYDROLANT 2411/15 · Cable ops2015-09-26 → 2015-11-07
    Seismic survey in progress until further notice by M/V ramform vanguard towing ten 8100 meter long cables in…
  19. HYDROLANT 2409/15 · Cable ops2015-09-26 → 2015-09-28
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  20. HYDROLANT 2402/15 · Other2015-09-25 → 2015-10-05
    Ordnance clearing operations in progress until further notice by M/V stril explorer in: a. 53-02.1N 000-26.3E

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