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 1033/99 · Nav aids1999-05-20 → 1999-05-21
    RACON at saint abbs head light 55-50N 002-08W inoperative
  2. HYDROLANT 990/99 · Nav aids1999-05-16 → 1999-05-16
    Skerryvore light 56-19N 007-07E unreliable
  3. HYDROLANT 970/99 · Cable ops1999-05-12 → 1999-05-13
    Cable operations in progress until further notice by cableship ulysse vicinity 51-20N 002-22E
  4. HYDROLANT 967/99 · Nav aids1999-05-12 → 1999-05-12
    Rosemarkie aerial VHF dsc facilities 57-38N 004-04W inoperative until further notice
  5. HYDROLANT 966/99 · Mines1999-05-12 → 2000-09-14
    Unexploded mine reported in 57-42.8N 003-46.8W
  6. HYDROLANT 957/99 · Cable ops1999-05-10 → 1999-05-12
    Cable operations in progress until further notice by cableship ulysse in vicinity 51-15N 002-13E
  7. HYDROLANT 948/99 · Surveys1999-05-09 → 1999-05-10
    Underwater operations in progress until further notice by M/V seeryp 1 in vicinity of trackline joining…
  8. HYDROLANT 946/99 · Nav aids1999-05-08 → 1999-05-09
    Orford ness light 52-05N 001-35E unlit
  9. HYDROLANT 943/99 · Surveys1999-05-08 → 1999-05-09
    Underwater operations in progress until further notice by M/V seeryp 1 along trackline between 51-21N…
  10. HYDROLANT 937/99 · Cable ops1999-05-07 → 1999-05-10
    Cable operations in progress until further notice by cableship ulysee in vicinity 51-08.0N 001-58.1E
  11. HYDROLANT 917/99 · Cable ops1999-05-05 → 1999-09-09
    Seismic survey in progress until further notice by M/V american explorer towing six 2500 meter long cables…
  12. HYDROLANT 913/99 · Surveys1999-05-05 → 1999-05-05
    Underwater operations in progress until further notice by M/V seeryp one vicinity of trackline between…
  13. HYDROLANT 906/99 · Nav aids1999-05-04 → 1999-05-04
    Stroma light 58-42N 003-07W unlit
  14. HYDROLANT 903/99 · Nav aids1999-05-04 → 1999-05-06
    Cromarty firth fairway buoy 57-40N 003-54W unlit
  15. HYDROLANT 896/99 · Nav aids1999-05-04 → 1999-05-04
    Stroma light 58-42N 003-07W unreliable
  16. HYDROLANT 888/99 · Cable ops1999-05-03 → 1999-05-09
    Underwater operations in progress until further notice by cableship monarch vicinity 51-35N 001-56E
  17. HYDROLANT 886/99 · Surveys1999-05-03 → 1999-05-04
    Underwater operations in progress until further notice by M/V seeryp one in vicinity of trackline between…
  18. HYDROLANT 882/99 · Other1999-05-02 → 1999-12-21
    Out skerries light 60-26N 000-44W at reduced intensity
  19. HYDROLANT 872/99 · Surveys1999-05-01 → 1999-05-02
    Underwater operations in progress until further notice by M/V seeryp 1 along track line between 51-20N…
  20. HYDROLANT 864/99 · Surveys1999-04-30 → 1999-05-01
    Underwater operations in progress until further notice by M/V seeryp 1 along track line joining 51-22N…

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