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 1357/17 · Surveys2017-04-29 → 2017-04-29
    Underwater operations in progress until further notice by barge taklift 4 in 53-05.0N 002-32.7E
  2. HYDROLANT 1336/17 · Nav aids2017-04-28 → 2017-04-28
    Dgps station at flamborough head 54-07.0N 000-04.9W off air
  3. HYDROLANT 1334/17 · Nav aids2017-04-27 → 2017-05-23
    Cgoc humber mf dsc at cullercoats 55-01N 001-25W unreliable
  4. HYDROLANT 1332/17 · Surveys2017-04-27 → 2017-06-11
    Survey operations in progress until further notice by M/V wg amundsen towing 12 6000 meter long cables in…
  5. HYDROLANT 1326/17 · Nav aids2017-04-26 → 2017-06-07
    Fog signal at platform 9/13-SPM3, 59-32.0N 001-33.5E inoperative
  6. HYDROLANT 1319/17 · Nav aids2017-04-25 → 2017-04-27
    Dgps station at flamborough head light 54-07N 000-05W off air 0800Z to 1600Z daily 26 and 27 apr
  7. HYDROLANT 1316/17 · Wrecks2017-04-25 → 2018-09-07
    Depths reported: a. 1.4 meters in 52-05.7N 001-35.8E
  8. HYDROLANT 1264/17 · Other2017-04-20 → 2017-05-11
    Unexploded ordnance in 51-18.81N 002-16.62E
  9. HYDROLANT 1256/17 · Surveys2017-04-20 → 2017-04-21
    Underwater operations in progress until further notice by barge taklift 4 in 53-05.0N 002-32.7E
  10. HYDROLANT 1243/17 · Wrecks2017-04-19 → 2017-05-31
    Depths reported: a. 5.3 meters in 60-13.19N 001-11.47W
  11. HYDROLANT 1238/17 · Cable ops2017-04-18 → 2017-05-05
    Partially submerged pipeline in vicinity 52-59.4N 001-34.3E
  12. HYDROLANT 1230/17 · Nav aids2017-04-17 → 2017-04-24
    Fog signal at 48/13-PB, 53-36.8N 001-31.5E inoperative
  13. HYDROLANT 1206/17 · Other2017-04-15 → 2017-05-27
    Unexploded ordnance in 51-19.31N 001-56.12E
  14. HYDROLANT 1198/17 · Wrecks2017-04-14 → 2017-05-26
    Dangerous wreck marked by lighted buoys in 51-40.20N 002-13.58E
  15. HYDROLANT 1192/17 · Nav aids2017-04-14 → 2017-05-26
    Fog signal at wind turbines inoperative in: a. 53-10.4N 001-04.8E
  16. HYDROLANT 1185/17 · Nav aids2017-04-14 → 2017-04-26
    Cgoc humber mf dsc at cullercoats 55-01N 001-25W unreliable
  17. HYDROLANT 1183/17 · Wrecks2017-04-13 → 2017-04-14
    Dangerous wreck marked by lighted buoys in 51-40.20N 002-13.58E
  18. HYDROLANT 1148/17 · Other2017-04-09 → 2017-04-16
    Fishing gear abandoned in 56-05.05N 002-28.41W
  19. HYDROLANT 1147/17 · Other2017-04-09 → 2017-05-21
    Light ranges temporarily reduced to 12 miles: a. tarbat ness 57-51.9N 003-46.6W
  20. HYDROLANT 1128/17 · Wrecks2017-04-07 → 2017-05-19
    14.5 meter depth reported in 60-38.43N 001-11.27W

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