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 3364/00 · Other2000-09-30 → 2000-10-01
    Hoy sound (high) light 58-56.2N 003-16.3W at reduced intensity
  2. HYDROLANT 3360/00 · Surveys2000-09-30 → 2000-09-30
    Underwater operations in progress until further notice by M/V ace nature in 54-38.9N 000-52.5W
  3. HYDROLANT 3347/00 · Surveys2000-09-29 → 2000-10-02
    Underwater operations in progress until further notice by M/V akademik golitsyn within one mile of 51-35.3N…
  4. HYDROLANT 3335/00 · Surveys2000-09-28 → 2000-09-29
    Underwater operations in progress until further notice by M/V ace nature in 54-38.9N 000-52.5W
  5. HYDROLANT 3325/00 · Surveys2000-09-27 → 2000-10-03
    Underwater operations in progress until further notice by M/V discovery within two miles of 57-35N 000-42W
  6. HYDROLANT 3312/00 · Nav aids2000-09-26 → 2000-09-29
    Ruytingen west buoy 51-07N 001-51E off station
  7. HYDROLANT 3288/00 · Surveys2000-09-24 → 2000-09-29
    Underwater operations in progress until further notice by M/V akademik golitsyn within one mile of 51-31.6N…
  8. HYDROLANT 3259/00 · Nav aids2000-09-21 → 2002-05-31
    RACON (o) established at mpc buoy 51-06.2N 001-38.2E
  9. HYDROLANT 3258/00 · Nav aids2000-09-21 → 2002-01-25
    F3 lightfloat 51-23.8N 002-00.5E range reduced to 15 miles
  10. HYDROLANT 3230/00 · Other2000-09-19 → 2000-09-19
    Dsc station gregness 57-08N 002-03W unable to receive
  11. HYDROLANT 3204/00 · Nav aids2000-09-16 → 2000-10-03
    West cardinal buoy 53-14N 002-49E missing
  12. HYDROLANT 3195/00 · Cable ops2000-09-15 → 2000-09-16
    Cable operations in progress until further notice by M/V ace nature vicinity: a. 55-38.9N 002-22.3E
  13. HYDROLANT 3191/00 · Cable ops2000-09-15 → 2000-09-15
    Cable operations in progress until further notice by M/V ace nature vicinity of 55-23.1N 001-26.7E
  14. HYDROLANT 3189/00 · Cable ops2000-09-15 → 2000-10-03
    Cable operations in progress until further notice by M/V geo scanner vicinity of trackline between 57-20N…
  15. HYDROLANT 3188/00 · Cable ops2000-09-15 → 2000-09-22
    Cable operations in progress until further notice by cableship discovery vicinity of trackline between…
  16. HYDROLANT 3183/00 · Nav aids2000-09-14 → 2000-09-16
    Dgps station at flamborough head light 54-07N 000-05W unreliable
  17. HYDROLANT 3124/00 · Cable ops2000-09-09 → 2000-09-10
    Cable operations in progress until further notice by cableship monarch with submersible within one mile of…
  18. HYDROLANT 3099/00 · Nav aids2000-09-07 → 2000-09-08
    Dsc station gregness 57-08N 002-03W off air
  19. HYDROLANT 3098/00 · Cable ops2000-09-07 → 2000-09-07
    Cable operations in progress until further notice by M/V ace nature vicinity 52-26N 001-48E
  20. HYDROLANT 3087/00 · Cable ops2000-09-06 → 2000-09-09
    Cable operations in progress until further notice by cableship monarch with submersible within one mile of…

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