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 1073/09 · Nav aids2009-06-10 → 2009-06-21
    Nga chart 37140 (33RD ed)
  2. HYDROLANT 1053/09 · Nav aids2009-06-08 → 2009-06-11
    Dgps station at flamborough head light 54-07.0N 000-04.8W inoperative 0800Z to 1600Z daily 09 thru 11 jun
  3. HYDROLANT 1015/09 · Other2009-06-03 → 2009-06-03
    Nga chart 35063 (1ST ed)
  4. HYDROLANT 997/09 · Surveys2009-05-31 → 2009-06-09
    Underwater operations in progress until further notice by M/V investigator in area bound by 53-15.74N…
  5. HYDROLANT 986/09 · Nav aids2009-05-29 → 2009-05-29
    Nga chart 35072 (1ST ed)
  6. HYDROLANT 977/09 · Surveys2009-05-28 → 2009-06-26
    Hydrographic survey operations in progress until further notice by M/V thetis within 12 miles of 54-18N…
  7. HYDROLANT 967/09 · Nav aids2009-05-26 → 2009-07-08
    Nga chart 37057 (2ND ed)
  8. HYDROLANT 962/09 · Nav aids2009-05-25 → 2009-07-07
    Nga chart 37057 (2ND ed)
  9. HYDROLANT 935/09 · Nav aids2009-05-22 → 2009-05-23
    Nga chart 37057 (2ND ed)
  10. HYDROLANT 921/09 · Nav aids2009-05-19 → 2009-07-11
    Nga chart 37140 (33RD ed)
  11. HYDROLANT 906/09 · Derelicts2009-05-15 → 2009-05-22
    Derelict 28 foot S/V, white hull, adrift in 56-14.5N 001-43.9W at 151914Z may
  12. HYDROLANT 876/09 · Other2009-05-13 → 2009-06-24
    Nga chart 37055 (0 ed)
  13. HYDROLANT 822/09 · Other2009-05-04 → 2009-05-07
    Bombing exercises 051115Z to 051230Z and 051530Z to 051645Z may, 0915Z to 1030Z and 1330Z to 1445Z daily 06…
  14. HYDROLANT 771/09 · Other2009-04-26 → 2009-04-27
    Nga chart 35063 (1ST ed)
  15. HYDROLANT 743/09 · Nav aids2009-04-20 → 2010-05-01
    Nga chart 37059 (0 ed)
  16. HYDROLANT 732/09 · Debris2009-04-19 → 2009-04-20
    Nga chart 35002 (1ST ed)
  17. HYDROLANT 700/09 · Nav aids2009-04-13 → 2009-04-14
    Nga chart 35068 (1ST ed)
  18. HYDROLANT 690/09 · Nav aids2009-04-11 → 2009-04-13
    Dsc station gregness 57-08N 002-03W mf dsc unreliable
  19. HYDROLANT 674/09 · Nav aids2009-04-09 → 2009-08-13
    Nga chart 37056 (1ST ed)
  20. HYDROLANT 651/09 · Nav aids2009-04-04 → 2009-05-16
    Nga chart 37120 (3RD ed)

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