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 702/04 · Cable ops2004-04-25 → 2004-05-05
    Cable operations in progress until further notice by barge pontra maris vicinity of 52-38.2N 001-46.8E
  2. HYDROLANT 657/04 · Nav aids2004-04-19 → 2004-04-21
    Stirling dgps station 56-04N 004-04W off air
  3. HYDROLANT 636/04 · Cable ops2004-04-17 → 2004-04-25
    Cable laying operations in progress until further notice by barge pontra maris within one mile of 52-37.5N…
  4. HYDROLANT 631/04 · Surveys2004-04-16 → 2004-10-27
    Dangerous wreck in 51-22.00N 002-12.90E marked by south cardinal buoys in: a. 51-21.61N 002-12.20E
  5. HYDROLANT 557/04 · Nav aids2004-04-03 → 2004-04-19
    Hinder 1 buoy 51-21N 002-11E unlit
  6. HYDROLANT 556/04 · Nav aids2004-04-03 → 2004-04-05
    Stirling dgps station 56-04N 004-04W at reduced power
  7. HYDROLANT 548/04 · Other2004-04-02 → 2004-04-03
    Balta sound light 60-44N 000-48W at reduced intensity
  8. HYDROLANT 539/04 · Cable ops2004-04-02 → 2004-04-14
    Seismic survey in progress until further notice by M/V sea explorer within 1.5 miles of 53-29N 002-55E
  9. HYDROLANT 508/04 · Debris2004-03-27 → 2004-03-28
    Fishing nets adrift vicinity: a. 51-02.5N 001-53.5E
  10. HYDROLANT 475/04 · Nav aids2004-03-24 → 2004-03-24
    Dgps station at flamborough head light 54-07N 000-05W off air 240800Z to 241700Z mar
  11. HYDROLANT 434/04 · Surveys2004-03-17 → 2004-03-26
    Submarine research operations in progress during daylight hours until 25 mar by M/V prince madog with…
  12. HYDROLANT 378/04 · Wrecks2004-03-05 → 2004-05-15
    Dangerous wreck in 59-01.6N 002-42.4W
  13. HYDROLANT 365/04 · Nav aids2004-03-03 → 2004-03-03
    Dgps station at flamborough head light 54-07N 000-05W off air until 031700Z mar
  14. HYDROLANT 346/04 · Cable ops2004-02-28 → 2004-03-09
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-28N 002-45E
  15. HYDROLANT 338/04 · Nav aids2004-02-27 → 2004-03-01
    Dgps station at flamborough head light 54-07N 000-05W unreliable
  16. HYDROLANT 315/04 · Cable ops2004-02-24 → 2004-03-02
    Underwater operations in progress until further notice by cableship peter faber vicinity 51-20N 002-28E
  17. HYDROLANT 282/04 · Nav aids2004-02-17 → 2004-03-26
    Ruytingen west buoy 51-07N 001-50E unlit
  18. HYDROLANT 227/04 · Other2004-02-08 → 2004-03-18
    West cardinal buoy 53-13.7N 002-48.9E unreliable
  19. HYDROLANT 218/04 · Other2004-02-06 → 2004-02-07
    Copinsay light 58-53.9N 002-40.1W at reduced intensity
  20. HYDROLANT 204/04 · Nav aids2004-02-04 → 2004-02-05
    Coquet island light 55-20N 001-32W unreliable 041200Z to 041700Z and 050800Z to 051600Z feb

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