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 1577/01 · Other2001-05-31 → 2001-06-06
    Dsc station shetland 60-09N 001-08W unable to recieve mf
  2. HYDROLANT 1574/01 · Cable ops2001-05-31 → 2001-06-04
    Underwater operations in progress until further notice by cableship maersk forwarder vicinity 51-24N 002-26E
  3. HYDROLANT 1560/01 · Cable ops2001-05-29 → 2001-06-02
    Underwater operations in progress until further notice by cableship monarch within one mile 51-34.6N 001-56.3E
  4. HYDROLANT 1550/01 · Surveys2001-05-29 → 2001-06-01
    Underwater operations in progress until further notice by M/V normand vester vicinity of trackline between…
  5. HYDROLANT 1529/01 · Surveys2001-05-26 → 2001-05-29
    Underwater operations in progress until further notice by M/V normand vester vicinity of trackline between…
  6. HYDROLANT 1528/01 · Nav aids2001-05-26 → 2001-05-26
    South holm buoy 52-27N 001-47E unlit
  7. HYDROLANT 1512/01 · Other2001-05-25 → 2001-05-25
    Start point light 59-17N 002-23W at reduced intensity
  8. HYDROLANT 1494/01 · Cable ops2001-05-24 → 2001-05-26
    Underwater operations in progress until further notice by cableship normand vester vicinity of trackline…
  9. HYDROLANT 1486/01 · Nav aids2001-05-23 → 2001-05-25
    Mid falls buoy 51-19N 001-47E off station
  10. HYDROLANT 1405/01 · Other2001-05-14 → 2001-05-15
    Sumburgh head light 59-51N 001-16W at reduced intensity
  11. HYDROLANT 1394/01 · Other2001-05-13 → 2001-05-14
    Hoy sound rear range light 58-56N 003-16W at reduced intensity
  12. HYDROLANT 1375/01 · Nav aids2001-05-12 → 2001-05-14
    Start point light 59-17N 002-22W unreliable
  13. HYDROLANT 1374/01 · Nav aids2001-05-12 → 2001-05-14
    Auskerry island light 59-02N 002-34W unreliable
  14. HYDROLANT 1360/01 · Nav aids2001-05-10 → 2001-05-13
    Dgps station at sumburgh head light 59-51N 001-16W unreliable 0830Z to 1600Z daily 10 thru 13 may
  15. HYDROLANT 1308/01 · Nav aids2001-05-03 → 2001-07-21
    Whitehill light 60-35N 001-00W temporarily changed to unsectored white light
  16. HYDROLANT 1295/01 · Nav aids2001-05-02 → 2001-05-03
    Southwold light 52-20N 001-41E range temporarily reduced to white ten miles and red six miles
  17. HYDROLANT 1291/01 · Cable ops2001-05-01 → 2001-05-02
    Underwater operations in progress until further notice by cableship voacz vicinity 54-11N 000-14W
  18. HYDROLANT 1278/01 · Cable ops2001-04-29 → 2001-05-03
    Underwater operations in progress until further notice by cableship peter faber vicinity 51-33N 001-56E
  19. HYDROLANT 1268/01 · Cable ops2001-04-28 → 2001-05-03
    Underwater operations in progress until further notice by cableship maersk forwarder vicinity of trackline…
  20. HYDROLANT 1258/01 · Cable ops2001-04-26 → 2001-04-28
    Underwater operations in progress until further notice by cableship maersk forwarder vicinity of trackline…

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