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 2605/00 · Wrecks2000-07-24 → 2001-01-11
    Dangerous wreck, least depth 7.2 meters, in 51-16.65N 001-28.10E
  2. HYDROLANT 2590/00 · Surveys2000-07-23 → 2000-07-25
    Survey operations in progress until further notice by M/V elinor within: a. two miles of 53-16.6N 000-39.6E
  3. HYDROLANT 2561/00 · Cable ops2000-07-20 → 2000-07-27
    Underwater operations in progress until further notice by cableship monarch within one mile of 52-26N 001-48E
  4. HYDROLANT 2541/00 · Surveys2000-07-19 → 2000-07-21
    Survey operations in progress until further notice by M/V elinor within: a. two miles of 53-16.6N 000-39.6E
  5. HYDROLANT 2533/00 · Other2000-07-18 → 2000-07-19
    Unexploded ordnance in 51-47.8N 001-41.3E
  6. HYDROLANT 2524/00 · Surveys2000-07-17 → 2000-07-31
    Underwater operations in progress until further notice by M/V oil express vicinity 51-22.3N 002-30.4E
  7. HYDROLANT 2520/00 · Cable ops2000-07-17 → 2000-08-02
    Cable operations in progress until further notice by cableship maersk fighter vicinity of trackline between…
  8. HYDROLANT 2519/00 · Surveys2000-07-17 → 2000-07-23
    Underwater operations in progress until further notice by M/V geo searcher vicinity of trackline between…
  9. HYDROLANT 2515/00 · Mines2000-07-16 → 2000-07-18
    Possible mine adrift vicinity 52-06.0N 002-27.1E at 162033Z jul
  10. HYDROLANT 2464/00 · Other2000-07-12 → 2000-07-14
    Tod head light 56-53N 002-12W at reduced intensity
  11. HYDROLANT 2459/00 · Nav aids2000-07-12 → 2000-07-12
    RACON at ordfordness light 52-05N 001-35E inoperative until 131700Z jul
  12. HYDROLANT 2458/00 · Cable ops2000-07-12 → 2000-07-17
    Cable operations in progress until further notice by M/V geo searcher vicinity of trackline joining 54-12N…
  13. HYDROLANT 2454/00 · Nav aids2000-07-12 → 2000-07-13
    Dgps station at north foreland light 51-23N 001-27E unreliable 0800Z to 1800Z daily 12 and 13 jul
  14. HYDROLANT 2453/00 · Nav aids2000-07-12 → 2000-07-17
    Mdw buoy 51-19N 001-59E unlit
  15. HYDROLANT 2430/00 · Nav aids2000-07-09 → 2000-07-10
    Fidra light 56-04N 002-47W unreliable
  16. HYDROLANT 2397/00 · Other2000-07-06 → 2000-08-01
    Four point mooring marked by lighted buoys within 700 meters of 51-22.3N 002-30.4E
  17. HYDROLANT 2381/00 · Surveys2000-07-05 → 2000-08-16
    Underwater operations in progress until further notice by M/V seaworker within one mile of trackline between…
  18. HYDROLANT 2343/00 · Other2000-07-02 → 2000-07-06
    M/V oil express moored in 51-22.3N 002-30.4E
  19. HYDROLANT 2312/00 · Nav aids2000-06-30 → 2000-07-01
    Fairway buoy 57-39.9N 003-54.2W unlit
  20. HYDROLANT 2246/00 · Surveys2000-06-23 → 2000-09-04
    Hydrographic survey in progress until further notice by M/V antares in area bound by 52-01N 002-34E, 52-54N…

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