North Sea

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

in force
1
last 12 months
6
since 1997
4,731
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 aids2,50253%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,730 cancelled

  1. HYDROLANT 1760/05 · Wrecks2005-09-27 → 2008-02-09
    Dangerous wreck in 53-37.3N 003-41.1E marked by cardinal lightbuoys
  2. HYDROLANT 1746/05 · Exercises2005-09-26 → 2005-09-26
    Hazardous operations 260930Z to 261000Z sep within four miles of trackline between 54-03N 000-10E and 54-10N…
  3. HYDROLANT 1733/05 · Nav aids2005-09-23 → 2005-09-23
    All navigational aids at foxtrot 3 lightship 51-23.9N 002-00.0E inoperative
  4. HYDROLANT 1729/05 · Other2005-09-22 → 2005-10-11
    Unexploded ordnance within five miles of 52-32N 003-00E
  5. HYDROLANT 1723/05 · Nav aids2005-09-21 → 2006-06-01
    South falls lightbuoy 51-13.8N 001-43.9E, fog signal permanently discontinued
  6. HYDROLANT 1718/05 · Nav aids2005-09-20 → 2005-09-21
    Fog signal at south falls lightbuoy 51-14N 001-44E inoperative
  7. HYDROLANT 1643/05 · Nav aids2005-09-09 → 2006-02-01
    All navigational aids at shell inde kilo platform 53-16.85N 002-41.51E unreliable
  8. HYDROLANT 1638/05 · Surveys2005-09-08 → 2005-09-14
    Underwater operations in progress until further notice by M/V normad pioneer along trackline between…
  9. HYDROLANT 1621/05 · Other2005-09-07 → 2005-10-11
    Unexploded ordnance in 53-05.0N 002-16.2E
  10. HYDROLANT 1619/05 · Cable ops2005-09-06 → 2005-10-05
    Seismic survey in progress until further notice by M/V northern explorer towing 4.7 mile long cable in area…
  11. HYDROLANT 1601/05 · Nav aids2005-09-02 → 2005-09-02
    Cross sand buoy 52-36.25N 002-01.57E unlit
  12. HYDROLANT 1597/05 · Other2005-09-02 → 2005-09-22
    Unexploded ordnance in 52-29.74N 002-52.36E
  13. HYDROLANT 1582/05 · Surveys2005-08-30 → 2005-09-27
    Dangerous wreck in 53-38.5N 003-37.9E marked by two west cardinal buoys,racon(d) and one east cardinal buoy
  14. HYDROLANT 1544/05 · Nav aids2005-08-24 → 2005-08-24
    NAVTEX cullercoats coast radio station 55-04N 001-28W off air
  15. HYDROLANT 1542/05 · Other2005-08-23 → 2005-09-27
    Unexploded ordnance in 52-49.40N 002-46.48E
  16. HYDROLANT 1533/05 · Other2005-08-22 → 2005-08-23
    St
  17. HYDROLANT 1490/05 · Nav aids2005-08-16 → 2005-08-17
    Dgps station at girdle ness light 57-08N 002-02W inoperative 161000Z to 161400Z and 171000Z to 171100Z aug
  18. HYDROLANT 1483/05 · Nav aids2005-08-15 → 2006-03-09
    Fog signal at north ronaldsay light 59-23N 002-23W discontinued
  19. HYDROLANT 1479/05 · Cable ops2005-08-15 → 2005-09-08
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 53-11.3N 002-23.9E
  20. HYDROLANT 1471/05 · Other2005-08-13 → 2005-10-05
    Pipelaying operations in progress until further notice by M/V seaway falcon vicinity of trackline joining…

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