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 25/08 · Nav aids2008-01-04 → 2008-01-05
    Nga chart 37059 (0 ed)
  2. HYDROLANT 13/08 · Other2008-01-02 → 2008-01-03
    Nga chart 35170 (4TH ed)
  3. HYDROLANT 7/08 · Nav aids2008-01-02 → 2008-01-02
    Nga chart 35166 (4TH ed)
  4. HYDROLANT 2177/07 · Nav aids2007-12-31 → 2008-02-23
    Nga chart 37166 (2ND ed)
  5. HYDROLANT 2176/07 · Surveys2007-12-31 → 2008-01-02
    Underwater operations in progress until further notice by drill barge pontra maris vicinity 51-25.2N 001-38.9E
  6. HYDROLANT 2170/07 · Other2007-12-30 → 2008-01-10
    Nga chart 35011 (2ND ed)
  7. HYDROLANT 2161/07 · Nav aids2007-12-27 → 2007-12-27
    Nga chart 35166 (4TH ed)
  8. HYDROLANT 2156/07 · Nav aids2007-12-26 → 2008-01-29
    Nga chart 37140 (33RD ed)
  9. HYDROLANT 2146/07 · Other2007-12-24 → 2007-12-24
    Nga chart 35166 (4th ed)
  10. HYDROLANT 2115/07 · Nav aids2007-12-17 → 2007-12-18
    Nga chart 35166 (4TH ed)
  11. HYDROLANT 2112/07 · Nav aids2007-12-17 → 2007-12-20
    Nga chart 37120 (3RD ed)
  12. HYDROLANT 2097/07 · Nav aids2007-12-15 → 2007-12-19
    Nga chart 35028 (0 ed)
  13. HYDROLANT 2079/07 · Nav aids2007-12-13 → 2007-12-13
    Nga chart 37140 (33RD ed)
  14. HYDROLANT 2040/07 · Nav aids2007-12-09 → 2007-12-12
    Nga chart 35027 (0 ed)
  15. HYDROLANT 2038/07 · Nav aids2007-12-08 → 2007-12-11
    Nga chart 37053 (0 ed)
  16. HYDROLANT 2035/07 · Surveys2007-12-08 → 2007-12-12
    Underwater operation in progress until further notice by M/V bucentaur in 53-03.0N 001-52.3E
  17. HYDROLANT 2024/07 · Nav aids2007-12-07 → 2007-12-07
    GPS jamming exercises 070900Z to 071700Z dec within six miles of 57-27.5N 001-48.4W
  18. HYDROLANT 1944/07 · Nav aids2007-11-23 → 2008-02-09
    Nga chart 37140 (33RD ed)
  19. HYDROLANT 1930/07 · Nav aids2007-11-21 → 2007-11-23
    Nga chart 35150 (3RD ed)
  20. HYDROLANT 1873/07 · Cable ops2007-11-11 → 2007-11-22
    Seismic survey in progress until further notice by M/V geolog dmitriy nalivkin towing 8000 meter long cable…

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