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 2481/09 · Nav aids2009-12-21 → 2009-12-24
    Nga chart 37057 (2ND ed)
  2. HYDROLANT 2476/09 · Nav aids2009-12-19 → 2009-12-20
    Nga chart 37057 (2ND ed)
  3. HYDROLANT 2461/09 · Nav aids2009-12-18 → 2009-12-19
    Nga chart 37140 (33RD ed)
  4. HYDROLANT 2456/09 · Containers2009-12-17 → 2009-12-20
    Two containers adrift in 54-16.8N 000-00.3W at 171125Z dec
  5. HYDROLANT 2409/09 · Cable ops2009-12-11 → 2009-12-15
    Underwater operations in progress until further notice by cableship wave sentinel with submersible in…
  6. HYDROLANT 2405/09 · Cable ops2009-12-10 → 2009-12-15
    Underwater operations in progress until further notice by cableship leon thevenin along trackline between…
  7. HYDROLANT 2397/09 · Nav aids2009-12-09 → 2010-01-19
    Nga chart 37120 (3RD ed)
  8. HYDROLANT 2381/09 · Nav aids2009-12-07 → 2009-12-07
    Nga chart 37140 (33RD ed)
  9. HYDROLANT 2368/09 · Wrecks2009-12-04 → 2009-12-09
    Nga chart 35002 (1ST ed)
  10. HYDROLANT 2348/09 · Nav aids2009-12-03 → 2009-12-03
    Nga chart 37059 (0 ed)
  11. HYDROLANT 2323/09 · Cable ops2009-11-29 → 2009-12-06
    Underwater operations in progress until further notice by cableship leon thevenin with submersible vicinity…
  12. HYDROLANT 2322/09 · Nav aids2009-11-29 → 2009-12-04
    GPS jamming exercises 1000Z to 1600Z daily 30 nov thru 04 dec in area bound by 55-09.0N 001-08.5W, 55-00.0N…
  13. HYDROLANT 2283/09 · Nav aids2009-11-23 → 2009-11-24
    Nga chart 37166 (2ND ed)
  14. HYDROLANT 2272/09 · Other2009-11-21 → 2009-11-22
    Nga chart 35008 (21ST ed)
  15. HYDROLANT 2248/09 · Other2009-11-19 → 2009-12-16
    Nga chart 37140 (33RD ed)
  16. HYDROLANT 2214/09 · Nav aids2009-11-14 → 2009-11-27
    GPS jamming exercises 1100Z to 1500Z daily 16 thru 20 and 23 thru 27 nov within 170 miles of 58-57N 003-14W…
  17. HYDROLANT 2183/09 · Nav aids2009-11-08 → 2009-11-09
    Nga chart 35001 (1ST ed)
  18. HYDROLANT 2126/09 · Nav aids2009-11-02 → 2009-11-03
    Nga chart 35055 (1ST ed)
  19. HYDROLANT 2121/09 · Nav aids2009-10-31 → 2009-11-01
    Nga chart 35027 (0 ed)
  20. HYDROLANT 2112/09 · Nav aids2009-10-30 → 2009-11-02
    Nga chart 35072 (1ST 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.