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 1021/14 · Other2014-04-15 → 2014-05-27
    Cancel HYDROLANT 205/14
  2. HYDROLANT 1020/14 · Nav aids2014-04-15 → 2014-04-16
    Cancel HYDROLANT 658/14
  3. HYDROLANT 1010/14 · Nav aids2014-04-13 → 2014-04-17
    England-southeast Coast
  4. HYDROLANT 1007/14 · Nav aids2014-04-12 → 2014-04-14
    Shetland Islands
  5. HYDROLANT 994/14 · Surveys2014-04-11 → 2014-04-25
    Underwater operations in progress until further notice by M/V fugro galaxy in area bound by 53-42.5N…
  6. HYDROLANT 979/14 · Nav aids2014-04-10 → 2014-04-10
    Cancel this msg 101300Z apr 14
  7. HYDROLANT 965/14 · Exercises2014-04-09 → 2014-04-10
    Hazardous operations
  8. HYDROLANT 948/14 · Cable ops2014-04-08 → 2014-05-15
    Seismic survey in progress until further notice by M/V atlantic explorer towing six 6700 meter long cables…
  9. HYDROLANT 932/14 · Exercises2014-04-06 → 2014-04-09
    Hazardous operations
  10. HYDROLANT 918/14 · Other2014-04-04 → 2014-04-07
    Large green buoy with moorings adrift in 53-12.5N 000-50.5E at 041110Z apr
  11. HYDROLANT 896/14 · Nav aids2014-04-02 → 2014-05-15
    Southern North Sea
  12. HYDROLANT 822/14 · Nav aids2014-03-23 → 2014-03-25
    England-southeast Coast
  13. HYDROLANT 804/14 · Cable ops2014-03-21 → 2014-05-06
    Seismic survey in progress until further notice by M/V ramform atlas towing 12 6500 meter long cables in…
  14. HYDROLANT 742/14 · Nav aids2014-03-14 → 2014-03-15
    Cancel HYDROLANT 286/14(24)
  15. HYDROLANT 741/14 · Nav aids2014-03-14 → 2014-03-14
    England-southeast Coast
  16. HYDROLANT 736/14 · Nav aids2014-03-13 → 2014-03-14
    England-southeast Coast
  17. HYDROLANT 728/14 · Nav aids2014-03-13 → 2014-03-14
    Cancel this msg 140059Z mar 14
  18. HYDROLANT 721/14 · Nav aids2014-03-12 → 2014-03-13
    England-southeast Coast
  19. HYDROLANT 719/14 · Nav aids2014-03-12 → 2014-03-12
    Cancel this msg 121800Z mar 14
  20. HYDROLANT 658/14 · Nav aids2014-03-04 → 2014-04-15
    Cancel HYDROLANT 339/14

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