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 418/10 · Other2010-03-10 → 2010-03-12
    Nga chart 35001 (1ST ed)
  2. HYDROLANT 417/10 · Cable ops2010-03-10 → 2010-03-14
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-20.5N 002-46.5E
  3. HYDROLANT 392/10 · Surveys2010-03-03 → 2010-11-16
    Salvage operations in progress until further notice in 52-45.9N 004-12.7E
  4. HYDROLANT 375/10 · Nav aids2010-03-01 → 2010-03-23
    Dover strait nga chart 37120 (3RD ed)
  5. HYDROLANT 362/10 · Nav aids2010-02-27 → 2010-02-27
    Nga chart 35000 (26TH ed)
  6. HYDROLANT 357/10 · Nav aids2010-02-26 → 2010-02-26
    Nga chart 37055 (0 ed)
  7. HYDROLANT 352/10 · Nav aids2010-02-24 → 2010-02-26
    Nga chart 35000 (26TH ed)
  8. HYDROLANT 334/10 · Nav aids2010-02-21 → 2010-04-04
    Nga chart 37057 (2ND ed)
  9. HYDROLANT 333/10 · Exercises2010-02-21 → 2010-02-26
    Hazardous operations
  10. HYDROLANT 310/10 · Nav aids2010-02-18 → 2010-02-18
    Dsc station saxavord 60-50N 000-50W unreliable
  11. HYDROLANT 304/10 · Nav aids2010-02-17 → 2010-02-17
    Mrcc shetland 60-09N 001-08W services off air
  12. HYDROLANT 298/10 · Other2010-02-16 → 2010-02-18
    Nga chart 35001 (1ST ed)
  13. HYDROLANT 289/10 · Nav aids2010-02-15 → 2010-03-30
    Nga chart 35063 (1ST ed)
  14. HYDROLANT 274/10 · Nav aids2010-02-12 → 2010-02-15
    Nga chart 37166 (2ND ed)
  15. HYDROLANT 271/10 · Nav aids2010-02-12 → 2010-05-08
    Nga chart 37057 (2ND ed)
  16. HYDROLANT 256/10 · Nav aids2010-02-10 → 2010-02-10
    Nga chart 37165 (3RD ed)
  17. HYDROLANT 246/10 · Nav aids2010-02-08 → 2010-02-08
    Dsc station langham 52-56.5N 000-57.3E off air
  18. HYDROLANT 243/10 · Nav aids2010-02-08 → 2010-02-12
    Nga chart 37057 (2ND ed)
  19. HYDROLANT 242/10 · Nav aids2010-02-07 → 2010-02-13
    Nga chart 35013 (0 ed)
  20. HYDROLANT 229/10 · Nav aids2010-02-05 → 2010-02-08
    Nga chart 37057 (2ND 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.