North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
6
since 1997
4,731
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 aids2,50253%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,730 cancelled

  1. HYDROLANT 1872/07 · Derelicts2007-11-11 → 2007-11-18
    Derelict F/V adrift in 53-51N 000-31E at 111313Z nov
  2. HYDROLANT 1846/07 · Other2007-11-07 → 2008-02-09
    Nga chart 37200 (15TH ed)
  3. HYDROLANT 1815/07 · Other2007-11-01 → 2007-11-16
    Nga chart 37055 (0 ed)
  4. HYDROLANT 1807/07 · Nav aids2007-10-31 → 2007-11-02
    Nga chart 35052 (0 ed)
  5. HYDROLANT 1789/07 · Nav aids2007-10-26 → 2008-02-09
    Nga chart 37057 (1ST ed)
  6. HYDROLANT 1787/07 · Nav aids2007-10-26 → 2007-10-26
    Nga chart 35166 (4TH ed)
  7. HYDROLANT 1689/07 · Nav aids2007-10-05 → 2007-10-05
    Mrcc humber 54-41.8N 001-10.5W off air
  8. HYDROLANT 1683/07 · Nav aids2007-10-04 → 2007-10-04
    Nga chart 37121 (11TH ed)
  9. HYDROLANT 1679/07 · Nav aids2007-10-03 → 2007-10-05
    Nga chart 37028 (0 ed)
  10. HYDROLANT 1675/07 · Nav aids2007-10-02 → 2007-10-04
    Pentland skerries light 58-41.4N 002-55.4W unlit
  11. HYDROLANT 1664/07 · Exercises2007-10-01 → 2007-10-05
    Hazardous operations 0900Z to 1100Z and 1400Z to 1600Z daily 01 thru 05 oct within four miles of trackline…
  12. HYDROLANT 1660/07 · Nav aids2007-09-30 → 2007-12-04
    Nga chart 37057 (1ST ed)
  13. HYDROLANT 1653/07 · Nav aids2007-09-28 → 2007-09-28
    Nga chart 37028 (0 ed)
  14. HYDROLANT 1647/07 · Nav aids2007-09-27 → 2008-01-30
    Nga chart 37062 (1ST ed)
  15. HYDROLANT 1627/07 · Nav aids2007-09-24 → 2007-09-26
    Nga chart 35150 (3RD ed)
  16. HYDROLANT 1615/07 · Nav aids2007-09-21 → 2007-09-24
    Nga chart 35130 (3RD ed)
  17. HYDROLANT 1602/07 · Cable ops2007-09-19 → 2007-10-01
    Seismic survey 20 thru 30 sep by M/V geco topaz towing eight 3500 meter long cables in area bound by 59-19N…
  18. HYDROLANT 1559/07 · Surveys2007-09-08 → 2007-09-24
    Underwater operations in progress until further notice by M/V polar bjorn between 53-00.28N 002-53.73E and…
  19. HYDROLANT 1545/07 · Other2007-09-06 → 2008-02-09
    Nga chart 35005 (1ST ed)
  20. HYDROLANT 1536/07 · Nav aids2007-09-05 → 2008-02-09
    Nga chart 37120 (2ND ed)

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