North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
7
since 1997
4,732
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 aids2,50353%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,731 cancelled

  1. HYDROLANT 2812/02 · Wrecks2002-12-20 → 2002-12-24
    Dangerous wreck in 51-21.9N 002-12.7E marked by east and west cardinal buoys and two south cardinal buoys,…
  2. HYDROLANT 2805/02 · Wrecks2002-12-19 → 2002-12-20
    Dangerous wreck in 51-21.9N 002-12.7E marked by: a. lighted south cardinal buoy in 51-21.6N 002-12.2E
  3. HYDROLANT 2788/02 · Nav aids2002-12-18 → 2002-12-18
    Girdle ness dgps station 57-08N 002-03W off air 181300Z to 181430Z dec
  4. HYDROLANT 2767/02 · Wrecks2002-12-16 → 2002-12-19
    Dangerous wrecks marked by: a. two buoys, fl g 4 sec, in 51-21.90N 002-12.65E
  5. HYDROLANT 2766/02 · Nav aids2002-12-16 → 2002-12-18
    Long sand head buoy 51-48N 001-39E unlit
  6. HYDROLANT 2765/02 · Wrecks2002-12-16 → 2002-12-16
    Dangerous wreck marked by two buoys, fl g 4 sec, in 51-21.90N 002-12.65E
  7. HYDROLANT 2754/02 · Nav aids2002-12-15 → 2002-12-15
    St
  8. HYDROLANT 2752/02 · Wrecks2002-12-14 → 2002-12-16
    Dangerous wreck marked by buoy, fl g 4 sec, in 51-21.90N 002-12.65E
  9. HYDROLANT 2744/02 · Derelicts2002-12-14 → 2002-12-14
    Derelict M/V tricolor adrift vicinity 51-22N 002-13E
  10. HYDROLANT 2734/02 · Nav aids2002-12-12 → 2002-12-13
    Dgps station at flamborough head light 54-07N 000-05W at reduced power
  11. HYDROLANT 2710/02 · Other2002-12-08 → 2002-12-09
    Duncansby head light 58-38.6N 003-01.5W at reduced intensity
  12. HYDROLANT 2687/02 · Cable ops2002-12-06 → 2002-12-17
    Underwater operations in progress until further notice by cableship maersk defender vicinity 52-50N 002-57E
  13. HYDROLANT 2666/02 · Nav aids2002-12-03 → 2002-12-03
    Dgps station at girdle ness light 57-08N 002-02W unreliable 031130Z to 031430Z dec
  14. HYDROLANT 2657/02 · Cable ops2002-11-30 → 2002-12-03
    Underwater operations in progress until further notice by cableship maersk defender vicinity 51-18N 002-24E
  15. HYDROLANT 2649/02 · Cable ops2002-11-29 → 2002-11-30
    Underwater operations in progress until further notice by cableship maersk defender vicinity 51-14N 002-17E
  16. HYDROLANT 2628/02 · Nav aids2002-11-27 → 2002-12-04
    Todhead point light 56-53N 002-13W unreliable
  17. HYDROLANT 2613/02 · Nav aids2002-11-25 → 2002-11-27
    Cromer light 52-55.5N 001-19.1E unreliable 251630Z to 260200Z and 261630Z to 270200Z nov
  18. HYDROLANT 2555/02 · Nav aids2002-11-20 → 2002-11-23
    Dsc station wideford hill 58-59.3N 003-01.5W inoperative
  19. HYDROLANT 2554/02 · Nav aids2002-11-19 → 2003-03-13
    Special buoy 56-20N 001-00W unlit
  20. HYDROLANT 2470/02 · Nav aids2002-11-09 → 2002-12-19
    Hinder 1 buoy 51-21N 002-11E missing

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