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 584/02 · Nav aids2002-03-13 → 2002-03-13
    RACON at buchan ness light 57-28N 001-46W unreliable until 131600Z mar
  2. HYDROLANT 567/02 · Nav aids2002-03-12 → 2002-03-22
    Skadan light 59-31N 001-39W unreliable
  3. HYDROLANT 566/02 · Nav aids2002-03-12 → 2002-03-12
    Skadan light 59-31N 001-39W unreliable
  4. HYDROLANT 535/02 · Nav aids2002-03-08 → 2002-04-05
    NSR-R1 light 53-56N 002-24E and NSR-R2 light 53-56N 002-51E unlit
  5. HYDROLANT 508/02 · Cable ops2002-03-04 → 2002-03-17
    Underwater operations in progress until further notice by cableship monarch vicinity 52-21N 002-53E
  6. HYDROLANT 500/02 · Nav aids2002-03-03 → 2002-03-25
    Sandettie west buoy 51-15N 001-55E damaged and unlit
  7. HYDROLANT 473/02 · Cable ops2002-02-28 → 2002-03-04
    Underwater cable operations in progress until further notice by cableship monarch vicinity 52-14N 002-14E
  8. HYDROLANT 464/02 · Nav aids2002-02-26 → 2002-03-02
    All navigational aids at platform (49/24-N) 53-17N 002-43E inoperative
  9. HYDROLANT 463/02 · Nav aids2002-02-26 → 2002-02-28
    Bid dowsing light 53-34N 000-53E unreliable
  10. HYDROLANT 459/02 · Nav aids2002-02-26 → 2002-02-27
    Orford ness light 52-05N 001-34E fixed red sector light unlit
  11. HYDROLANT 379/02 · Cable ops2002-02-16 → 2002-02-22
    Underwater cable operations in progress until further notice by cableship monarch vicinity 52-15N 002-15E
  12. HYDROLANT 374/02 · Nav aids2002-02-15 → 2002-05-03
    Newarp lightship 52-48.3N 001-55.7E range reduced to 16 miles
  13. HYDROLANT 356/02 · Nav aids2002-02-12 → 2002-02-12
    RACON at orfordness light 52-05N 001-34E unreliable 121000Z to 121500Z feb
  14. HYDROLANT 323/02 · Other2002-02-07 → 2002-02-08
    Copinsay light 58-53.8N 002-40.3W at reduced intensity
  15. HYDROLANT 306/02 · Nav aids2002-02-06 → 2002-02-07
    East goodwin lightfloat 51-13N 001-36E missing
  16. HYDROLANT 300/02 · Nav aids2002-02-06 → 2002-02-07
    Winterton RACON 52-43N 001-42E inoperative
  17. HYDROLANT 288/02 · Nav aids2002-02-04 → 2002-02-06
    East goodwin lightfloat 51-13N 001-36E missing
  18. HYDROLANT 240/02 · Nav aids2002-01-31 → 2002-03-03
    Sandettie west buoy 51-15N 001-55E missing
  19. HYDROLANT 219/02 · Nav aids2002-01-30 → 2002-01-30
    Start point light 59-17N 002-23W unlit
  20. HYDROLANT 208/02 · Other2002-01-28 → 2002-01-29
    Elie ness light 56-11N 002-49W at reduced intensity

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