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 167/09 · Nav aids2009-01-25 → 2009-01-25
    Dsc station windy head 57-39N 002-14W inoperative
  2. HYDROLANT 162/09 · Wrecks2009-01-24 → 2009-01-28
    Nga chart 37056 (1ST ed)
  3. HYDROLANT 145/09 · Wrecks2009-01-22 → 2009-01-27
    Nga chart 37057 (2ND ed)
  4. HYDROLANT 135/09 · Nav aids2009-01-21 → 2009-01-21
    Nga chart 35072 (1ST ed)
  5. HYDROLANT 95/09 · Nav aids2009-01-17 → 2009-01-19
    Outer skerry light 60-33.1N 001-18.2W unreliable
  6. HYDROLANT 86/09 · Nav aids2009-01-15 → 2009-04-09
    Nga chart 37056 (1ST ed)
  7. HYDROLANT 82/09 · Nav aids2009-01-15 → 2009-02-05
    Nga chart 35013 (0 ed)
  8. HYDROLANT 67/09 · Other2009-01-11 → 2009-01-15
    Bombing exercises 1400Z to 1500Z daily 12 thru 15 jan in area bound by 55-02N 001-00W, 55-20N 001-07W,…
  9. HYDROLANT 32/09 · Cable ops2009-01-05 → 2009-01-11
    Underwater operations in progress until further notice by cableship leon thevenin within two miles of…
  10. HYDROLANT 29/09 · Nav aids2009-01-05 → 2009-01-05
    Nga chart 37057 (2ND ed)
  11. HYDROLANT 24/09 · Nav aids2009-01-05 → 2009-01-30
    Nga chart 37059 (0 ed)
  12. HYDROLANT 18/09 · Wrecks2009-01-04 → 2009-01-24
    Nga chart 37056 (1ST ed)
  13. HYDROLANT 17/09 · Nav aids2009-01-03 → 2009-01-04
    Nga chart 37058 (2ND ed)
  14. HYDROLANT 16/09 · Wrecks2009-01-03 → 2009-01-04
    Nga chart 37056 (1ST ed)
  15. HYDROLANT 14/09 · Wrecks2009-01-03 → 2009-01-03
    Nga chart 37056 (1ST ed)
  16. HYDROLANT 2278/08 · Nav aids2008-12-31 → 2009-01-30
    Nga chart 37059 (0 ed)
  17. HYDROLANT 2231/08 · Nav aids2008-12-22 → 2009-01-16
    Nga chart 37057 (0 ed)
  18. HYDROLANT 2226/08 · Nav aids2008-12-22 → 2008-12-31
    Nga chart 35065 (1ST ed)
  19. HYDROLANT 2222/08 · Nav aids2008-12-22 → 2008-12-22
    Nga chart 37120 (3RD ed)
  20. HYDROLANT 2202/08 · Cable ops2008-12-19 → 2009-01-12
    Seismic survey in progress until further notice by M/V beaufort explorer in area bound by 54-00N 000-00E,…

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