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 3864/00 · Cable ops2000-11-16 → 2000-11-17
    Underwater operations in progress until further notice by cableship monarch within: a. one mile of 51-15.0N…
  2. HYDROLANT 3863/00 · Nav aids2000-11-16 → 2000-11-20
    Mid falls buoy 51-19N 001-47E unlit
  3. HYDROLANT 3855/00 · Other2000-11-15 → 2000-11-15
    Red flare sighted vicinity 58-22N 000-04E
  4. HYDROLANT 3834/00 · Cable ops2000-11-14 → 2000-11-16
    Underwater operations in progress until further notice by cableship monarch within one mile of 51-15.0N…
  5. HYDROLANT 3828/00 · Nav aids2000-11-13 → 2000-11-20
    Out skerries light 60-26N 000-44W unreliable
  6. HYDROLANT 3798/00 · Wrecks2000-11-10 → 2002-02-19
    18 meter wreck reported in 56-57.2N 001-34.4W
  7. HYDROLANT 3751/00 · Surveys2000-11-07 → 2000-11-10
    Underwater operations in progress until further notice by M/V ace venture vicinity of trackline between…
  8. HYDROLANT 3716/00 · Surveys2000-11-04 → 2000-11-06
    Underwater operations in progress until further notice by M/V ace nature vicinity of trackline between…
  9. HYDROLANT 3706/00 · Surveys2000-11-04 → 2000-11-04
    Underwater operations in progress until further notice by M/V ace nature vicinity of trackline between…
  10. HYDROLANT 3702/00 · Nav aids2000-11-03 → 2000-11-04
    Dudgeon buoy 53-17N 001-17E unlit
  11. HYDROLANT 3695/00 · Surveys2000-11-03 → 2000-11-10
    Underwater operations in progress until further notice by M/V fennica vicinity 52-28N 002-11E
  12. HYDROLANT 3693/00 · Nav aids2000-11-02 → 2000-11-07
    Cs 4 buoy 51-09N 001-34E off station
  13. HYDROLANT 3688/00 · Nav aids2000-11-02 → 2000-11-02
    Dgps station at flamborough head light 54-07N 000-05W unreliable 021400Z to 021600Z nov
  14. HYDROLANT 3687/00 · Cable ops2000-11-02 → 2000-11-05
    Cable operations in progress until further notice by cableship monarch within 0.5 miles of 51-14.8N 002-20.5E
  15. HYDROLANT 3681/00 · Surveys2000-11-02 → 2000-11-04
    Underwater operations in progress until further notice by M/V ace nature vicinity 55-15N 000-59E
  16. HYDROLANT 3667/00 · Surveys2000-11-01 → 2000-11-01
    Underwater operations in progress until further notice by M/V ace nature vicinity of trackline between…
  17. HYDROLANT 3664/00 · Nav aids2000-11-01 → 2000-11-15
    RACON at humber lightfloat 53-39N 000-20E inoperative
  18. HYDROLANT 3661/00 · Surveys2000-10-31 → 2000-11-01
    Underwater operations in progress until further notice by M/V ace nature vicinity of trackline between…
  19. HYDROLANT 3648/00 · Nav aids2000-10-30 → 2000-10-30
    Dgps station at flamborough head light 54-07N 000-05W at reduced power
  20. HYDROLANT 3645/00 · Nav aids2000-10-30 → 2000-10-31
    East goodwin lightfloat 51-13N 001-37E off station

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