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 1482/02 · Other2002-07-04 → 2002-08-03
    Pipelaying operations in progress until further notice: a. within three miles of 53-57N 000-35E
  2. HYDROLANT 1464/02 · Nav aids2002-07-03 → 2002-07-03
    Dgps station at north foreland light 51-23N 001-27E unreliable 030730Z to 031600Z jul
  3. HYDROLANT 1412/02 · Nav aids2002-06-25 → 2002-06-25
    All navigational aids at newarp lightship 52-48.4N 001-55.8E unreliable
  4. HYDROLANT 1364/02 · Nav aids2002-06-19 → 2002-06-19
    Dgps station at flambourough head light 54-07N 000-05W unreliable until 191700Z jun
  5. HYDROLANT 1363/02 · Other2002-06-19 → 2002-07-11
    Possible unexploded ordnance in: a. 53-44.3N 000-36.5E
  6. HYDROLANT 1311/02 · Other2002-06-13 → 2002-06-15
    Rcw buoy 51-06N 001-45E unreliable
  7. HYDROLANT 1227/02 · Other2002-06-02 → 2002-07-04
    Pipelaying operations in progress until further notice by M/V cso apache: a. within three miles of 53-57N…
  8. HYDROLANT 1226/02 · Surveys2002-06-02 → 2002-06-02
    Underwater operations in progress until further notice by M/V highland fortress in area bound by 54-03N…
  9. HYDROLANT 1218/02 · Nav aids2002-06-01 → 2002-06-05
    All navigational aids at platform 14/9-MCP-01 (58-50N 000-17W) unreliable
  10. HYDROLANT 1208/02 · Nav aids2002-05-31 → 2002-05-31
    Out skerries light 60-25.5N 000-43.7W unreliable
  11. HYDROLANT 1191/02 · Other2002-05-29 → 2002-10-19
    Pipelaying operations in progress until further notice by M/V seaway kestrel vicinity of trackline between…
  12. HYDROLANT 1163/02 · Nav aids2002-05-25 → 2002-05-29
    Dsc station shetland 60-09N 001-08W inoperative
  13. HYDROLANT 1161/02 · Nav aids2002-05-24 → 2002-05-27
    Ruytingen west buoy 51-07N 001-51E unlit
  14. HYDROLANT 1128/02 · Other2002-05-19 → 2002-06-19
    Pipelaying operations in progress until further notice by M/V cso apache and M/V skandi inspector along…
  15. HYDROLANT 1123/02 · Surveys2002-05-18 → 2002-05-19
    Survey operations in progress until further notice by M/V confidante in area bound by 51-08.7N 001-41.2E,…
  16. HYDROLANT 1117/02 · Surveys2002-05-16 → 2002-06-14
    Underwater operations in progress until further notice by M/V jean charcot towing one mile long cable along…
  17. HYDROLANT 1095/02 · Nav aids2002-05-13 → 2002-05-14
    East cardinal buoy, VQ(3) w 5 sec 10 miles, RACON (d), established in 54-28N 002-38E
  18. HYDROLANT 1066/02 · Wrecks2002-05-09 → 2003-01-04
    Dangerous wreck, least depth 13.7 meters, marked by buoy, RACON (d) in 54-31.0N 002-36.3E
  19. HYDROLANT 1057/02 · Wrecks2002-05-07 → 2002-05-09
    Dangerous wreck reported in 54-31N 002-36E
  20. HYDROLANT 1045/02 · Nav aids2002-05-05 → 2002-05-21
    Ruytingen west buoy 51-06.9N 001-50.4E 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.