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 1095/16 · Nav aids2016-05-08 → 2016-05-09
    NAVTEX station pinneberg 53-40.5N 009-48.5E off air
  2. HYDROLANT 1084/16 · Other2016-05-06 → 2016-06-16
    Unexploded ordnance: a. 52-00.94N 001-54.45E
  3. HYDROLANT 1064/16 · Nav aids2016-05-04 → 2016-05-15
    Mimas gas platform, 53-45.8N 001-42.3E unlit
  4. HYDROLANT 1063/16 · Other2016-05-04 → 2016-05-06
    Unexploded ordnance: a. 52-00.94N 001-54.45E
  5. HYDROLANT 1062/16 · Nav aids2016-05-04 → 2016-05-09
    All navigational aids at platform 49/12-AR, 53-32.0N 002-15.2E inoperative
  6. HYDROLANT 1050/16 · Other2016-05-02 → 2016-05-04
    Unexploded ordnance: a. 52-00.94N 001-54.45E
  7. HYDROLANT 1030/16 · Nav aids2016-04-29 → 2016-05-06
    Platform 49/5A ST-1, 53-50.6N 002-52.1E unlit
  8. HYDROLANT 999/16 · Nav aids2016-04-27 → 2016-06-09
    All navigational aids at platform 42/30-B 54-03.6N 000-54.0E inoperative
  9. HYDROLANT 994/16 · Other2016-04-27 → 2016-05-02
    Unexploded ordnance reported in 52-03.20N 001-48.84E
  10. HYDROLANT 991/16 · Cable ops2016-04-26 → 2016-05-07
    Seismic survey in progress until further notice by M/V ramform vanguard towing ten 8000 meter long cables in…
  11. HYDROLANT 990/16 · Nav aids2016-04-26 → 2016-04-27
    All navigational aids at platform 42/30-B 54-03.6N 000-54.0E unreliable
  12. HYDROLANT 966/16 · Nav aids2016-04-23 → 2016-04-24
    Sunk N2 buoy 51-54.3N 001-46.3E unlit
  13. HYDROLANT 965/16 · Nav aids2016-04-23 → 2016-04-25
    Sumburgh head light 59-51.2N 001-16.5W unreliable
  14. HYDROLANT 959/16 · Nav aids2016-04-23 → 2016-04-25
    NAVTEX station cullercoats 55-02N 001-26W off air
  15. HYDROLANT 954/16 · Other2016-04-22 → 2016-05-02
    Unexploded ordnance reported in 52-00.9N 001-54.5E
  16. HYDROLANT 953/16 · Nav aids2016-04-22 → 2016-06-03
    Mrcc aberdeen mf r/t and dsc service at greg ness 57-08N 002-03W off air
  17. HYDROLANT 916/16 · Surveys2016-04-16 → 2016-05-11
    Survey operations in progress until further notice by M/V franklin vicinity of trackline joining 57-40.7N…
  18. HYDROLANT 873/16 · Nav aids2016-04-12 → 2016-07-05
    Fog signal at wind turbine E17, 51-24.4N 001-40.8E unreliable
  19. HYDROLANT 853/16 · Cable ops2016-04-10 → 2016-04-14
    Underwater operations in progress until further notice by cableship ile d'aix along trackline between…
  20. HYDROLANT 846/16 · Nav aids2016-04-09 → 2016-04-09
    Dgps station at girdle ness light 57-08.3N 002-02.8W off air

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