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 358/08 · Cable ops2008-02-25 → 2008-03-26
    Seismic survey in progress until further notice by M/V sea surveyor towing 2500 meter long cable in area…
  2. HYDROLANT 353/08 · Other2008-02-24 → 2008-02-27
    500 meter long fishing net reported in 58-40.0N 003-08.7W at 241700Z feb
  3. HYDROLANT 315/08 · Nav aids2008-02-15 → 2008-02-16
    Nga chart 37110 (11TH ed)
  4. HYDROLANT 290/08 · Nav aids2008-02-10 → 2008-02-11
    Nga chart 35150 (3RD ed)
  5. HYDROLANT 287/08 · Nav aids2008-02-10 → 2008-05-03
    Nga chart 37058 (0 ed)
  6. HYDROLANT 285/08 · Nav aids2008-02-09 → 2008-02-10
    Nga chart 37121 (11 ed)
  7. HYDROLANT 225/08 · Other2008-02-01 → 2008-02-01
    Dsc stations saxavord 60-49.8N 000-50.2W, collafirth 60-32.1N 001-23.4W and compass 59-52.2N 001-16.3W…
  8. HYDROLANT 214/08 · Nav aids2008-01-30 → 2008-04-08
    Nga chart 37059 (0 ed)
  9. HYDROLANT 191/08 · Other2008-01-26 → 2008-01-31
    Nga chart 35170 (4TH ed)
  10. HYDROLANT 132/08 · Nav aids2008-01-18 → 2008-01-22
    Nga chart 37140 (33RD ed)
  11. HYDROLANT 130/08 · Nav aids2008-01-17 → 2008-01-21
    Nga chart 37055 (0 ed)
  12. HYDROLANT 117/08 · Nav aids2008-01-15 → 2008-02-09
    Nga chart 35051 (0 ed)
  13. HYDROLANT 106/08 · Wrecks2008-01-14 → 2008-02-09
    Vessel aground in 52-52.4N 001-45.9E
  14. HYDROLANT 89/08 · Other2008-01-11 → 2008-02-21
    Nga chart 37166 (2ND ed)
  15. HYDROLANT 57/08 · Nav aids2008-01-07 → 2009-01-10
    Nga chart 35005 (1ST ed)
  16. HYDROLANT 53/08 · Nav aids2008-01-07 → 2008-01-07
    Nga chart 37056 (1ST ed)
  17. HYDROLANT 51/08 · Other2008-01-07 → 2008-04-05
    Nga chart 35008 (21ST ed), 37166 (2ND ed)
  18. HYDROLANT 34/08 · Other2008-01-04 → 2008-02-09
    Mrcc shetland 60-08.9N 001-08.2W mf radio at reduced range
  19. HYDROLANT 27/08 · Nav aids2008-01-04 → 2008-01-05
    Nga chart 35008 (21ST ed)
  20. HYDROLANT 26/08 · Nav aids2008-01-04 → 2008-01-28
    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.