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 1330/10 · Nav aids2010-07-14 → 2010-07-14
    Dsc station saxavord 60-50N 000-50W off air
  2. HYDROLANT 1322/10 · Nav aids2010-07-12 → 2010-08-02
    Nga chart 37058 (2ND ed)
  3. HYDROLANT 1316/10 · Nav aids2010-07-11 → 2010-07-16
    Nga chart 37059 (0 ed)
  4. HYDROLANT 1313/10 · Nav aids2010-07-11 → 2010-07-12
    Nga chart 37058 (2ND ed)
  5. HYDROLANT 1271/10 · Nav aids2010-07-05 → 2010-07-08
    Nga chart 37120 (3RD ed)
  6. HYDROLANT 1260/10 · Nav aids2010-07-05 → 2010-07-20
    Nga chart 37058 (2ND ed)
  7. HYDROLANT 1248/10 · Nav aids2010-07-03 → 2010-07-03
    Nga chart 35063 (1ST ed)
  8. HYDROLANT 1231/10 · Nav aids2010-07-01 → 2010-08-12
    Nga chart 35014 (3RD ed)
  9. HYDROLANT 1227/10 · Other2010-06-30 → 2010-07-02
    Bombing exercises 0900Z to 1800Z daily 01 and 02 jul in area bound by 55-02N 001-00W, 55-31N 001-11W, 55-42N…
  10. HYDROLANT 1222/10 · Cable ops2010-06-30 → 2010-07-04
    Underwater operations in progress until further notice by cableship leon thevenin with submersible vicinity…
  11. HYDROLANT 1205/10 · Nav aids2010-06-29 → 2010-08-10
    Nga chart 37057 (2ND ed)
  12. HYDROLANT 1201/10 · Nav aids2010-06-28 → 2010-06-29
    Nga chart 35072 (1ST ed)
  13. HYDROLANT 1189/10 · Nav aids2010-06-25 → 2010-06-26
    Nga chart 37120 (3RD ed)
  14. HYDROLANT 1175/10 · Nav aids2010-06-24 → 2010-06-25
    Nga chart 35056 (1ST ed)
  15. HYDROLANT 1168/10 · Nav aids2010-06-23 → 2010-06-24
    Nga chart 35056 (1ST ed)
  16. HYDROLANT 1156/10 · Nav aids2010-06-22 → 2010-08-14
    Nga chart 35055 (1ST ed)
  17. HYDROLANT 1155/10 · Nav aids2010-06-22 → 2010-06-23
    Dgps station at flamborough head light 54-07.0N 000-04.9W off air 0900Z to 1000Z daily 22 and 23 jun
  18. HYDROLANT 1150/10 · Nav aids2010-06-20 → 2010-07-02
    Nga chart 37057 (2ND ed)
  19. HYDROLANT 1147/10 · Nav aids2010-06-20 → 2010-06-22
    Nga chart 37057 (2ND ed)
  20. HYDROLANT 1130/10 · Containers2010-06-17 → 2010-06-20
    Container adrift in 54-32.5N 000-44.4E at 171226Z jun

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