North Sea

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

in force
1
last 12 months
6
since 1997
4,730
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%
Other66814%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,729 cancelled

  1. HYDROLANT 1435/14 · Nav aids2014-06-09 → 2014-07-24
    Cancel HYDROLANT 1065/14
  2. HYDROLANT 1434/14 · Nav aids2014-06-08 → 2014-07-24
    Cancel HYDROLANT 1096/14
  3. HYDROLANT 1414/14 · Other2014-06-06 → 2014-06-25
    Pipelaying operations in progress until further notice by M/V seven navica vicinity of trackline between…
  4. HYDROLANT 1398/14 · Other2014-06-04 → 2014-08-02
    B. 57-59.27N 000-51.09E
  5. HYDROLANT 1395/14 · Other2014-06-03 → 2014-06-06
    Survey equipment and 79 meter long cable adrift vicinity 53-15.9N 001-22.7E
  6. HYDROLANT 1385/14 · Other2014-06-02 → 2014-06-03
    B. 49/5A-ST1, 53-50.5N 002-52.1E
  7. HYDROLANT 1374/14 · Nav aids2014-06-02 → 2014-06-02
    Cancel this msg 031800Z jun 14
  8. HYDROLANT 1364/14 · Nav aids2014-06-01 → 2014-06-01
    England-southeast Coast
  9. HYDROLANT 1363/14 · Cable ops2014-06-01 → 2014-06-05
    Underwater operations in progress until further notice by cableship raymond croze with submersible vicinity…
  10. HYDROLANT 1359/14 · Nav aids2014-05-31 → 2014-05-31
    England-southeast Coast
  11. HYDROLANT 1355/14 · Nav aids2014-05-30 → 2014-05-30
    Shetland Islands
  12. HYDROLANT 1347/14 · Nav aids2014-05-30 → 2014-05-30
    Cancel this msg 301400Z may 14
  13. HYDROLANT 1345/14 · Nav aids2014-05-30 → 2014-05-30
    England-southeast Coast
  14. HYDROLANT 1321/14 · Other2014-05-27 → 2014-06-20
    Cancel HYDROLANT 1021/14
  15. HYDROLANT 1308/14 · Cable ops2014-05-24 → 2014-06-29
    Seismic survey in progress until further notice by M/V oceanic challenger towing 12 6750 meter long cables…
  16. HYDROLANT 1304/14 · Other2014-05-23 → 2014-05-28
    B. 49/5A ST-1, 53-50.5N 002-52.1E
  17. HYDROLANT 1271/14 · Cable ops2014-05-19 → 2014-07-11
    Seismic survey in progress until further notice by M/V polar duke towing ten 3000 meter long cables in area…
  18. HYDROLANT 1256/14 · Cable ops2014-05-17 → 2014-05-19
    Underwater operations in progress until further notice by cableship raymond croze with submersible vicinity…
  19. HYDROLANT 1252/14 · Nav aids2014-05-17 → 2014-05-17
    Shetland Islands
  20. HYDROLANT 1241/14 · Cable ops2014-05-15 → 2014-06-22
    Seismic survey in progress until further notice by M/V atlantic explorer towing six 6500 meter long cables…

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