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 288/12 · Nav aids2012-02-04 → 2012-02-06
    Orkney Islands
  2. HYDROLANT 274/12 · Containers2012-02-02 → 2012-02-05
    Container adrift in 58-07.4N 000-48.4E at 021215Z feb
  3. HYDROLANT 261/12 · Nav aids2012-02-01 → 2012-02-05
    Southern North Sea
  4. HYDROLANT 253/12 · Nav aids2012-01-31 → 2012-01-31
    Southern North Sea
  5. HYDROLANT 245/12 · Nav aids2012-01-30 → 2012-03-12
    Southern North Sea
  6. HYDROLANT 236/12 · Nav aids2012-01-29 → 2012-02-04
    48/6-C 53-45.2N 001-04.8E
  7. HYDROLANT 235/12 · Nav aids2012-01-29 → 2012-01-29
    England-east Coast
  8. HYDROLANT 224/12 · Nav aids2012-01-27 → 2012-01-29
    Orkney Islands
  9. HYDROLANT 217/12 · Nav aids2012-01-27 → 2012-01-27
    Orkney Islands
  10. HYDROLANT 186/12 · Nav aids2012-01-23 → 2012-01-24
    Cancel HYDROLANT 180/12
  11. HYDROLANT 180/12 · Nav aids2012-01-22 → 2012-01-23
    Southern North Sea
  12. HYDROLANT 167/12 · Nav aids2012-01-21 → 2012-02-11
    Cancel HYDROLANT 2118/11
  13. HYDROLANT 163/12 · Nav aids2012-01-20 → 2012-03-03
    Southern North Sea
  14. HYDROLANT 147/12 · Other2012-01-19 → 2012-05-12
    England-southeast Coast
  15. HYDROLANT 138/12 · Nav aids2012-01-18 → 2012-02-11
    Cancel HYDROLANT 2073/11
  16. HYDROLANT 118/12 · Cable ops2012-01-15 → 2012-01-29
    Cable laying operations in progress until further notice by M/V asv pioneer vicinity of trackline between…
  17. HYDROLANT 105/12 · Nav aids2012-01-14 → 2012-01-22
    Southern North Sea
  18. HYDROLANT 63/12 · Cable ops2012-01-08 → 2012-01-10
    Underwater operations in progress until further notice by cableship wave sentinel vicintiy 52-24.24N…
  19. HYDROLANT 52/12 · Nav aids2012-01-06 → 2012-01-07
    Dover Strait
  20. HYDROLANT 48/12 · Other2012-01-06 → 2012-01-09
    Numerous fishing traps adrift in 60-08.76N 000-51.50E at 061136Z jan

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