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 1833/03 · Nav aids2003-09-26 → 2003-12-03
    Mdw buoy 51-19N 001-59E unlit
  2. HYDROLANT 1820/03 · Debris2003-09-23 → 2003-09-30
    Fishing gear marked by buoys adrift in 59-09.7N 000-13.9W
  3. HYDROLANT 1804/03 · Nav aids2003-09-21 → 2003-09-21
    Copinsay light 58-53.8N 002-40.2W unlit
  4. HYDROLANT 1801/03 · Nav aids2003-09-20 → 2003-11-17
    Muckle skerry light 60-26N 000-52W temporarily changed to: fl (2) w 10 sec 7 miles
  5. HYDROLANT 1782/03 · Cable ops2003-09-18 → 2003-09-19
    Underwater operations in progress until further notice by cableship maersk defender vicinity 52-47.7N…
  6. HYDROLANT 1775/03 · Debris2003-09-17 → 2003-09-24
    Fishing gear marked by red buoy adrift in 51-05.4N 001-46.3E
  7. HYDROLANT 1759/03 · Cable ops2003-09-13 → 2003-09-18
    Underwater operations in progress until further notice by cableship maersk defender vicinity 52-48.0N…
  8. HYDROLANT 1730/03 · Cable ops2003-09-10 → 2003-09-13
    Cable operations in progress until further notice by cableship maersk defender within one mile of 52-48.0N…
  9. HYDROLANT 1726/03 · Nav aids2003-09-10 → 2003-09-10
    Stirling dgps station 56-04N 004-04W off air 100900Z to 101700Z sep
  10. HYDROLANT 1701/03 · Other2003-09-07 → 2003-09-15
    Rce buoy 51-03N 001-53E unreliable
  11. HYDROLANT 1687/03 · Nav aids2003-09-04 → 2003-09-20
    Muckle skerry light 60-26.4N 000-51.7W temporarily changed to: fl (2) w 10 sec 5 miles
  12. HYDROLANT 1617/03 · Nav aids2003-08-24 → 2003-08-25
    Mousa light 59-59.8N 001-09.4W unlit
  13. HYDROLANT 1612/03 · Other2003-08-23 → 2003-09-01
    Pipelaying operations in progress until further notice by M/V cso apache along trackline between 60-14.2N…
  14. HYDROLANT 1600/03 · Nav aids2003-08-21 → 2003-10-25
    Newarp lightfloat 52-48N 001-56E replaced by safewater buoy, lfl 10 sec, RACON (o)
  15. HYDROLANT 1567/03 · Debris2003-08-18 → 2003-08-25
    Fishing nets marked by buoys adrift in 56-28.2N 000-41.4E
  16. HYDROLANT 1555/03 · Nav aids2003-08-15 → 2003-08-21
    Oxcars light 56-01.4N 003-16.8W unreliable
  17. HYDROLANT 1553/03 · Wrecks2003-08-15 → 2003-12-23
    Dangerous wreck marked by east cardinal buoy, vq (3) 5 sec, RACON (d) in 52-33.47N 002-32.88E and west…
  18. HYDROLANT 1537/03 · Nav aids2003-08-13 → 2003-08-13
    Dgps station at girdle ness light 57-08N 002-02W inoperative 130900Z to 131200Z aug
  19. HYDROLANT 1516/03 · Wrecks2003-08-10 → 2003-08-15
    Dangerous wreck marked by east cardinal buoy, vq (3) 5 sec, in 52-33.47N 002-32.70E
  20. HYDROLANT 1513/03 · Nav aids2003-08-09 → 2003-08-14
    Platform 53-34N 001-58E all navigational aids inoperative

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