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 2281/99 · Cable ops1999-10-26 → 1999-11-04
    Cable operations in progress until further notice by M/V stm inspector in area bound by 52-27.2N 001-44.1E,…
  2. HYDROLANT 2280/99 · Other1999-10-26 → 1999-11-19
    Aircraft ditched vicinity 57-50N 003-20W
  3. HYDROLANT 2274/99 · Cable ops1999-10-25 → 1999-11-04
    Cable operations in progress until further notice by M/V sea explorer between 52-26N 002-11E and 52-29N…
  4. HYDROLANT 2265/99 · Surveys1999-10-23 → 1999-10-27
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  5. HYDROLANT 2263/99 · Nav aids1999-10-22 → 1999-11-22
    Ruytingen southwest buoy 51-05N 001-47E missing
  6. HYDROLANT 2243/99 · Other1999-10-20 → 1999-10-26
    Aircraft ditched vicinity 57-51N 003-24W
  7. HYDROLANT 2233/99 · Surveys1999-10-18 → 1999-10-23
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  8. HYDROLANT 2223/99 · Surveys1999-10-16 → 1999-10-18
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  9. HYDROLANT 2217/99 · Nav aids1999-10-16 → 1999-10-22
    Pentland skerries light 58-41N 002-55W unreliable
  10. HYDROLANT 2191/99 · Surveys1999-10-13 → 1999-10-16
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  11. HYDROLANT 2181/99 · Nav aids1999-10-12 → 1999-10-13
    Cromer light 52-56N 001-19E unreliable 121100Z to 121600Z and 130700Z to 131600Z oct
  12. HYDROLANT 2176/99 · Cable ops1999-10-11 → 1999-10-23
    Cable operations in progress until further notice along trackline between 52-27.2N 001-44.1E and 52-28.9N…
  13. HYDROLANT 2173/99 · Surveys1999-10-11 → 1999-11-03
    Underwater operations in progress until further notice by M/V well servicer between 57-01.9N 001-57.4E and…
  14. HYDROLANT 2172/99 · Surveys1999-10-11 → 1999-10-13
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  15. HYDROLANT 2161/99 · Surveys1999-10-09 → 1999-10-11
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  16. HYDROLANT 2142/99 · Surveys1999-10-07 → 1999-10-08
    Underwater operations in progress until further notice by M/V goosander vicinity of trackline between 51-23N…
  17. HYDROLANT 2141/99 · Surveys1999-10-07 → 1999-10-09
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  18. HYDROLANT 2131/99 · Surveys1999-10-06 → 1999-10-07
    Underwater operations in progress until further notice by M/V goosander along trackline between 51-23N…
  19. HYDROLANT 2130/99 · Surveys1999-10-06 → 1999-10-07
    Underwater operations in progress until further notice by M/V northern admiral vicinity 51-21.4N 001-33.2E
  20. HYDROLANT 2124/99 · Nav aids1999-10-06 → 1999-10-07
    Bawdsey VHF dsc station 52-00N 001-25E off air

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