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 2356/03 · Cable ops2003-12-19 → 2003-12-26
    Seismic survey in progress until further notice by M/V geo searcher towing 3000 meter long cable: a. in area…
  2. HYDROLANT 2355/03 · Wrecks2003-12-19 → 2003-12-22
    Dangerous wreck in 57-45.4N 003-09.9W
  3. HYDROLANT 2334/03 · Nav aids2003-12-16 → 2003-12-18
    Bergues buoy 51-17N 002-19E unlit
  4. HYDROLANT 2331/03 · Cable ops2003-12-15 → 2003-12-29
    Cable laying operations in progress until further notice by barge pontra maris vicinity 52-37.5N 001-46.0E
  5. HYDROLANT 2323/03 · Nav aids2003-12-14 → 2003-12-20
    Ruytingen southeast buoy 51-09N 002-09E unlit
  6. HYDROLANT 2317/03 · Nav aids2003-12-13 → 2003-12-15
    RACON at F3 buoy 51-24N 002-01E inoperative
  7. HYDROLANT 2286/03 · Debris2003-12-08 → 2003-12-15
    Fishing net marked by red buoy adrift in 51-05.4N 001-46.3E
  8. HYDROLANT 2283/03 · Other2003-12-07 → 2003-12-08
    Isle of may light 56-11N 002-34W at reduced intensity
  9. HYDROLANT 2191/03 · Other2003-11-22 → 2003-11-23
    Duncansby head light 58-38.6N 003-01.5W at reduced intensity
  10. HYDROLANT 2183/03 · Cable ops2003-11-21 → 2003-11-26
    Cable laying operations in progress until further notice by barge pontra maris vicinity 52-37.5N 001-46.0E
  11. HYDROLANT 2162/03 · Other2003-11-17 → 2003-11-28
    Fairy south buoy 51-21N 002-17E unreliable
  12. HYDROLANT 2107/03 · Nav aids2003-11-09 → 2003-11-10
    Dgps station at flamborough head light 54-07N 000-05W unreliable
  13. HYDROLANT 2106/03 · Nav aids2003-11-09 → 2003-11-11
    Bell rock light 56-26N 002-23W unlit
  14. HYDROLANT 2059/03 · Nav aids2003-11-01 → 2003-11-03
    Longsand head buoy 51-48N 001-39E unlit
  15. HYDROLANT 1974/03 · Other2003-10-21 → 2003-10-29
    Pipelaying operations in progress until further notice by M/V cso apache along trackline between 57-14N…
  16. HYDROLANT 1971/03 · Nav aids2003-10-20 → 2003-10-20
    Hinder 1 buoy 51-21.7N 002-13.3E unlit and RACON inoperative
  17. HYDROLANT 1961/03 · Other2003-10-18 → 2003-12-06
    Pipelaying operations in progress until further notice by barge skandi navica along trackline between…
  18. HYDROLANT 1933/03 · Nav aids2003-10-15 → 2003-10-18
    Long sand head buoy 51-48N 001-39E unlit
  19. HYDROLANT 1917/03 · Nav aids2003-10-12 → 2003-10-12
    Clythness light 58-18.7N 003-12.6W unlit
  20. HYDROLANT 1878/03 · Nav aids2003-10-03 → 2003-10-05
    Mousa island light 60-00N 001-09W unlit

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