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 2334/16 · Nav aids2016-09-08 → 2016-09-27
    All navigational aids at platform 49/12-AR, 53-32.0N 002-15.2E inoperative
  2. HYDROLANT 2333/16 · Nav aids2016-09-08 → 2016-09-26
    All navigational aids at platform 49/22-ZD, 53-19.5N 002-14.3E inoperative
  3. HYDROLANT 2330/16 · Surveys2016-09-08 → 2016-09-27
    Survey operations in progress until further notice by M/V titan discovery vicinity of trackline joining…
  4. HYDROLANT 2325/16 · Nav aids2016-09-07 → 2016-09-10
    Platform 49/9B, 53-49.9N 002-46.3E, unlit and fog signal inoperative
  5. HYDROLANT 2318/16 · Nav aids2016-09-07 → 2016-09-14
    All navigational aids at platform 48/6-B, 53-43.1N 001-07.1E inoperative
  6. HYDROLANT 2315/16 · Nav aids2016-09-07 → 2016-09-08
    Dgps station at north foreland light 51-22.5N 001-26.9E off air 0800Z to 1600Z daily 07 and 08 sep
  7. HYDROLANT 2300/16 · Cable ops2016-09-05 → 2016-09-09
    Underwater operations in progress until further notice by cableship pierre de fermat with submersible…
  8. HYDROLANT 2275/16 · Cable ops2016-09-03 → 2016-09-23
    Seismic survey in progress until further notice by M/V polarcus asima and M/V osprey explorer towing eight…
  9. HYDROLANT 2193/16 · Other2016-08-26 → 2016-08-30
    Unexploded ordnance: a. in 51-59.50N 001-59.74E
  10. HYDROLANT 2191/16 · Nav aids2016-08-26 → 2017-04-18
    All navigational aids at platform ranform banff, 57-00.0N 001-17.6E inoperative
  11. HYDROLANT 2159/16 · Cable ops2016-08-23 → 2016-10-09
    Seismic survey in progress until further notice by M/V wg tasman in area bound by 58-55.0N 002-06.8E,…
  12. HYDROLANT 2149/16 · Nav aids2016-08-23 → 2016-10-04
    Mrcc aberdeen mf dsc service at greg ness 57-08N 002-03W off air
  13. HYDROLANT 2144/16 · Nav aids2016-08-22 → 2016-10-03
    Fog signal at platform 12/21C jacky, 58-11.0N 002-58.8W inoperative
  14. HYDROLANT 2139/16 · Nav aids2016-08-21 → 2016-09-08
    All navigational aids at platform 48/13-PB, 53-36.8N 001-31.5E inoperative
  15. HYDROLANT 2134/16 · Nav aids2016-08-20 → 2016-08-25
    Platform 49/12-AR, 53-32.0N 002-15.4E unlit and fog signal inoperative
  16. HYDROLANT 2124/16 · Nav aids2016-08-19 → 2016-09-03
    All navigational aids at platform 43/26-ST2, 54-03.3N 001-02.1E unreliable
  17. HYDROLANT 2099/16 · Nav aids2016-08-17 → 2016-09-01
    Fog signal at east goodwin lightfloat 51-13.0N 001-36.3E unreliable
  18. HYDROLANT 2081/16 · Nav aids2016-08-16 → 2016-09-20
    Ruytingen w buoy 51-06.9N 001-50.4E missing
  19. HYDROLANT 2079/16 · Nav aids2016-08-16 → 2016-08-17
    Dgps station at sumburgh head light 59-51.3N 001-16.4W off air 161200Z to 161600Z and 170800Z to 171600Z aug
  20. HYDROLANT 2047/16 · Cable ops2016-08-12 → 2016-10-01
    Seismic survey in progress until further notice by M/V sanco swift towing 12 8100 meter long cables in area…

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