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 2062/11 · Nav aids2011-12-06 → 2011-12-06
    Nga chart 35072 (1ST ed)
  2. HYDROLANT 2055/11 · Nav aids2011-12-05 → 2011-12-10
    Nga chart 37057 (2ND ed)
  3. HYDROLANT 2053/11 · Nav aids2011-12-05 → 2012-05-16
    Nga chart 37057 (2ND ed)
  4. HYDROLANT 2049/11 · Nav aids2011-12-04 → 2011-12-05
    Nga chart 35172 (2ND ed)
  5. HYDROLANT 2046/11 · Nav aids2011-12-04 → 2011-12-31
    Nga chart 35002 (1ST ed)
  6. HYDROLANT 2018/11 · Nav aids2011-11-28 → 2011-12-26
    Nga chart 35013 (0 ed)
  7. HYDROLANT 2017/11 · Nav aids2011-11-28 → 2011-11-28
    Nga chart 35072 (1ST ed)
  8. HYDROLANT 2010/11 · Exercises2011-11-27 → 2011-12-01
    Hazardous operations
  9. HYDROLANT 1996/11 · Nav aids2011-11-26 → 2011-11-27
    Nga chart 35069 (1ST ed)
  10. HYDROLANT 1993/11 · Nav aids2011-11-26 → 2011-11-28
    Nga chart 35056 (1ST ed)
  11. HYDROLANT 1981/11 · Nav aids2011-11-25 → 2012-02-11
    Nga chart 37166 (2ND ed)
  12. HYDROLANT 1966/11 · Other2011-11-23 → 2015-04-02
    Nga chart 37140 (33RD ed)
  13. HYDROLANT 1953/11 · Cable ops2011-11-21 → 2011-11-24
    Cable laying operations in progress until further notice by cableship asv pioneer vicinity 52-01.2N 001-50.2E
  14. HYDROLANT 1925/11 · Nav aids2011-11-18 → 2011-11-19
    Nga chart 35013 (3RD ed)
  15. HYDROLANT 1923/11 · Nav aids2011-11-17 → 2012-06-02
    Nga chart 37057 (2ND ed)
  16. HYDROLANT 1911/11 · Nav aids2011-11-15 → 2011-11-16
    Nga chart 35013 (0 ed)
  17. HYDROLANT 1902/11 · Cable ops2011-11-15 → 2011-11-18
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 52-36N 002-15E
  18. HYDROLANT 1895/11 · Nav aids2011-11-14 → 2011-12-26
    Nga chart 37166 (2ND ed)
  19. HYDROLANT 1886/11 · Cable ops2011-11-12 → 2011-11-21
    Underwater operations in progress until further notice by cableship sovereign vicinity 53-24.24N 001-49.62E
  20. HYDROLANT 1872/11 · Nav aids2011-11-09 → 2011-11-10
    Nga chart 35014 (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.