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 1981/13 · Wrecks2013-08-13 → 2016-02-28
    England-east Coast
  2. HYDROLANT 1960/13 · Cable ops2013-08-10 → 2013-08-17
    Seismic survey in progress until further notice by M/V ramform valiant towing 12 four mile long cables in…
  3. HYDROLANT 1951/13 · Nav aids2013-08-09 → 2013-08-14
    Cancel HYDROLANT 1933/13(24)
  4. HYDROLANT 1942/13 · Surveys2013-08-08 → 2013-09-02
    Underwater operations in progress until further notice by M/V franklin in areas bound by: a. 57-30.5N…
  5. HYDROLANT 1919/13 · Nav aids2013-08-07 → 2013-08-07
    Cancel this msg 071800Z aug 13
  6. HYDROLANT 1911/13 · Surveys2013-08-06 → 2013-08-08
    Geophysical survey in progress until further notice by M/V franklin in area bound by 57-30.9N 001-47.3W,…
  7. HYDROLANT 1886/13 · Cable ops2013-08-03 → 2013-09-16
    Seismic survey in progress until further notice by M/V atlantic explorer towing six 6500 meter long cables…
  8. HYDROLANT 1884/13 · Cable ops2013-08-03 → 2013-09-05
    Seismic survey in progress until further notice by M/V harrier explorer towing 4.6 mile long cable in area…
  9. HYDROLANT 1883/13 · Nav aids2013-08-03 → 2013-09-07
    B. 49/17-HD 53-29.8N 002-19.4E
  10. HYDROLANT 1868/13 · Nav aids2013-08-01 → 2013-08-23
    England-southeast Coast
  11. HYDROLANT 1867/13 · Other2013-08-01 → 2013-09-28
    England-southeast Coast
  12. HYDROLANT 1862/13 · Cable ops2013-07-31 → 2013-08-07
    Seismic survey in progress until further notice by M/V geco triton towing six 6000 meter long cables in area…
  13. HYDROLANT 1836/13 · Nav aids2013-07-29 → 2013-08-23
    Cancel HYDROLANT 1490/13
  14. HYDROLANT 1794/13 · Nav aids2013-07-24 → 2013-07-29
    Scotland-east Coast
  15. HYDROLANT 1767/13 · Cable ops2013-07-21 → 2013-10-19
    Seismic survey in progress until further notice by M/V pgs apollo towing ten four mile cables in area bound…
  16. HYDROLANT 1740/13 · Nav aids2013-07-18 → 2013-07-25
    Southern North Sea
  17. HYDROLANT 1727/13 · Cable ops2013-07-17 → 2013-08-18
    Seismic survey in progress until 17 aug by M/V western regent towing 12 2.5 mile long cables in area bound…
  18. HYDROLANT 1720/13 · Nav aids2013-07-17 → 2013-07-17
    Shetland Islands
  19. HYDROLANT 1714/13 · Nav aids2013-07-16 → 2013-08-27
    North Sea
  20. HYDROLANT 1696/13 · Other2013-07-15 → 2013-11-18
    Cancel HYDROLANT 1365/13

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