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 201/13 · Nav aids2013-01-23 → 2013-01-23
    Yell Sound
  2. HYDROLANT 195/13 · Nav aids2013-01-21 → 2013-01-26
    Scotland
  3. HYDROLANT 184/13 · Nav aids2013-01-20 → 2013-01-21
    Orkney Islands
  4. HYDROLANT 182/13 · Nav aids2013-01-20 → 2013-04-14
    Southern North Sea
  5. HYDROLANT 178/13 · Nav aids2013-01-20 → 2013-01-20
    Southern North Sea
  6. HYDROLANT 158/13 · Other2013-01-18 → 2013-03-02
    Ordnance
  7. HYDROLANT 154/13 · Nav aids2013-01-18 → 2013-01-21
    Dover Strait
  8. HYDROLANT 149/13 · Nav aids2013-01-17 → 2013-01-18
    England-southeast Coast
  9. HYDROLANT 143/13 · Nav aids2013-01-16 → 2013-01-30
    Southern North Sea
  10. HYDROLANT 142/13 · Nav aids2013-01-16 → 2013-02-22
    Southern North Sea
  11. HYDROLANT 128/13 · Nav aids2013-01-15 → 2013-02-26
    Southern North Sea
  12. HYDROLANT 77/13 · Nav aids2013-01-08 → 2013-03-09
    Cancel HYDROLANT 65/13
  13. HYDROLANT 71/13 · Nav aids2013-01-08 → 2013-01-08
    Scotland-north Coast
  14. HYDROLANT 65/13 · Nav aids2013-01-07 → 2013-01-08
    Orkney Islands
  15. HYDROLANT 64/13 · Nav aids2013-01-07 → 2013-01-11
    Dover Strait
  16. HYDROLANT 60/13 · Nav aids2013-01-07 → 2013-01-07
    Orkney Islands
  17. HYDROLANT 35/13 · Nav aids2013-01-03 → 2013-01-05
    Shetland Islands
  18. HYDROLANT 21/13 · Nav aids2013-01-03 → 2013-01-03
    Shetland Islands
  19. HYDROLANT 17/13 · Nav aids2013-01-02 → 2013-01-03
    Shetland Islands
  20. HYDROLANT 16/13 · Nav aids2013-01-02 → 2013-01-03
    Shetland Islands

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