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 1144/04 · Nav aids2004-07-07 → 2004-07-08
    North foreland dgps station 51-22.5N 001-26.8E off air 0830Z to 1700Z daily 07 and 08 jul
  2. HYDROLANT 1136/04 · Cable ops2004-07-06 → 2004-12-13
    Seismic survey in progress until further notice by M/V odin explorer towing 4.5 mile long cable in area…
  3. HYDROLANT 1127/04 · Cable ops2004-07-05 → 2004-07-07
    Underwater operations in progress until further notice by cableship peter faber displaying RACON (d)…
  4. HYDROLANT 1122/04 · Nav aids2004-07-04 → 2004-07-05
    RACON at sunk lightfloat 51-51N 001-35E unreliable
  5. HYDROLANT 1117/04 · Surveys2004-07-03 → 2004-07-26
    Underwater operations in progress until further notice by M/V seaway eagle vicinity 57-34N 000-54W
  6. HYDROLANT 1096/04 · Nav aids2004-06-30 → 2004-06-30
    Cantick head light 58-47N 003-08W unreliable
  7. HYDROLANT 1061/04 · Nav aids2004-06-23 → 2004-06-24
    Dgps station at flamborough head light 54-07N 000-05W unreliable 0830Z to 1700Z daily 23 and 24 jun
  8. HYDROLANT 1036/04 · Nav aids2004-06-18 → 2004-06-21
    Hammond knoll buoy 52-52.3N 001-58.5E unlit
  9. HYDROLANT 991/04 · Nav aids2004-06-08 → 2004-06-10
    Stirling dgps station 56-04N 004-04W inoperative
  10. HYDROLANT 957/04 · Nav aids2004-06-03 → 2004-06-03
    Dgps station at sumburgh head light 59-51.3N 001-16.5W off air 031000Z to 031500Z jun
  11. HYDROLANT 953/04 · Nav aids2004-06-02 → 2004-06-07
    Fairy south buoy 51-21N 002-17E unlit
  12. HYDROLANT 924/04 · Cable ops2004-05-28 → 2004-06-04
    Cable operations in progress until further notice by cableship wave sentinel vicinity 53-08N 001-31E
  13. HYDROLANT 874/04 · Nav aids2004-05-21 → 2004-05-21
    Stirling dgps station 56-04N 004-04W off air 211000Z to 211100Z may 2. cancel HYDROLANT 864/04(23)
  14. HYDROLANT 852/04 · Other2004-05-18 → 2004-05-20
    Skroo light 59-33N 001-36W at reduced intensity
  15. HYDROLANT 848/04 · Nav aids2004-05-17 → 2004-05-18
    Stirling dgps station 56-04N 004-04W off air 181100Z to 181500Z may 2. cancel this msg 181600Z may
  16. HYDROLANT 844/04 · Other2004-05-16 → 2004-05-18
    Skroo light 59-33N 001-36W at reduced intensity
  17. HYDROLANT 838/04 · Other2004-05-15 → 2004-05-16
    Copinsay light 58-53.9N 002-40.1W at reduced intensity
  18. HYDROLANT 808/04 · Nav aids2004-05-11 → 2004-05-12
    Kinnairds head light 57-41.9N 002-00.1W unreliable
  19. HYDROLANT 790/04 · Debris2004-05-09 → 2004-05-16
    Fishing nets marked by buoys adrift in 58-35.0N 001-37.4W
  20. HYDROLANT 789/04 · Cable ops2004-05-09 → 2004-05-15
    Seismic survey in progress until further notice by M/V geo searcher towing 1000 meter long cable within 2.5…

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