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 2452/10 · Nav aids2010-12-18 → 2011-01-12
    Nga chart 37057 (2ND ed)
  2. HYDROLANT 2435/10 · Other2010-12-16 → 2011-01-25
    Thames estuary approaches
  3. HYDROLANT 2434/10 · Nav aids2010-12-16 → 2010-12-20
    Nga chart 35072 (1ST ed)
  4. HYDROLANT 2428/10 · Nav aids2010-12-15 → 2010-12-18
    Thames estuary approaches
  5. HYDROLANT 2409/10 · Nav aids2010-12-13 → 2010-12-13
    Nga chart 37057 (2ND ed)
  6. HYDROLANT 2392/10 · Nav aids2010-12-11 → 2010-12-13
    Dsc station cullercoats 55-04N 001-28W mf rt and dsc unreliable
  7. HYDROLANT 2387/10 · Nav aids2010-12-11 → 2010-12-11
    Dsc station cullercoats 55-04N 001-28W mf rt and dsc off air
  8. HYDROLANT 2385/10 · Nav aids2010-12-10 → 2010-12-11
    Dsc station saxavord 60-50N 000-50W off air
  9. HYDROLANT 2365/10 · Nav aids2010-12-08 → 2010-12-18
    Nga chart 37057 (2ND ed)
  10. HYDROLANT 2350/10 · Nav aids2010-12-05 → 2011-01-09
    Nga chart 35055 (1ST ed)
  11. HYDROLANT 2343/10 · Nav aids2010-12-04 → 2010-12-05
    Nga chart 37140 (33RD ed)
  12. HYDROLANT 2342/10 · Nav aids2010-12-04 → 2010-12-11
    Nga chart 37058 (2ND ed)
  13. HYDROLANT 2336/10 · Nav aids2010-12-03 → 2011-01-12
    Nga chart 37057 (2ND ed)
  14. HYDROLANT 2331/10 · Nav aids2010-12-03 → 2010-12-08
    Nga chart 37058 (2ND ed)
  15. HYDROLANT 2307/10 · Nav aids2010-12-01 → 2010-12-02
    Dsc station gregness 57-08N 002-03W mf dsc and rt off air
  16. HYDROLANT 2283/10 · Nav aids2010-11-28 → 2010-12-05
    Nga chart 35000 (26TH ed)
  17. HYDROLANT 2279/10 · Nav aids2010-11-27 → 2011-01-08
    Minerva gas field
  18. HYDROLANT 2274/10 · Wrecks2010-11-27 → 2010-12-04
    Nga chart 37052 (2ND ed)
  19. HYDROLANT 2273/10 · Other2010-11-27 → 2010-12-13
    Nga chart 37059 (0 ed)
  20. HYDROLANT 2272/10 · Nav aids2010-11-27 → 2010-12-05
    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.