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 1377/12 · Nav aids2012-06-25 → 2012-06-25
    Scotland-east Coast
  2. HYDROLANT 1355/12 · Other2012-06-21 → 2012-08-11
    Pipelaying operations in progress until further notice by barge tog mor along trackline joining 53-39.7N…
  3. HYDROLANT 1346/12 · Nav aids2012-06-20 → 2012-06-26
    Ordnance
  4. HYDROLANT 1345/12 · Other2012-06-20 → 2012-07-03
    Cancel HYDROLANT 484/12
  5. HYDROLANT 1344/12 · Nav aids2012-06-20 → 2012-08-01
    Dover Strait
  6. HYDROLANT 1318/12 · Other2012-06-18 → 2012-07-30
    Cancel HYDROLANT 969/12
  7. HYDROLANT 1299/12 · Nav aids2012-06-16 → 2012-07-28
    Southern North Sea
  8. HYDROLANT 1290/12 · Nav aids2012-06-16 → 2012-06-17
    Scotland-east Coast
  9. HYDROLANT 1277/12 · Surveys2012-06-14 → 2012-06-16
    Underwater operations in progress until further notice by M/V highland eagle vicinity 54-40.3N 000-51.8E
  10. HYDROLANT 1254/12 · Nav aids2012-06-12 → 2012-06-14
    Cancel this msg 141700Z jun
  11. HYDROLANT 1244/12 · Nav aids2012-06-10 → 2012-06-10
    Shetland Islands
  12. HYDROLANT 1243/12 · Surveys2012-06-09 → 2012-06-12
    Underwater operations in progress until further notice by M/V highland eagle vicinity 54-34.6N 000-30.1E
  13. HYDROLANT 1236/12 · Other2012-06-08 → 2012-06-10
    Dover Strait
  14. HYDROLANT 1217/12 · Other2012-06-06 → 2012-08-29
    Cancel HYDROLANT 891/12
  15. HYDROLANT 1136/12 · Nav aids2012-05-27 → 2012-05-28
    Shetland Islands
  16. HYDROLANT 1132/12 · Nav aids2012-05-26 → 2012-05-28
    Shetland Islands
  17. HYDROLANT 1087/12 · Nav aids2012-05-20 → 2012-05-22
    Shetland Islands
  18. HYDROLANT 1086/12 · Nav aids2012-05-20 → 2012-05-21
    England-east Coast
  19. HYDROLANT 1055/12 · Nav aids2012-05-16 → 2012-05-17
    England-east Coast
  20. HYDROLANT 1052/12 · Nav aids2012-05-16 → 2012-06-16
    Cancel HYDROLANT 2053/11

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