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 1823/09 · Other2009-09-22 → 2009-09-25
    Nga chart 37140 (33RD ed)
  2. HYDROLANT 1815/09 · Nav aids2009-09-21 → 2009-09-23
    Nga chart 35072 (1ST ed)
  3. HYDROLANT 1811/09 · Nav aids2009-09-21 → 2009-11-02
    Nga chart 35055 (1ST ed)
  4. HYDROLANT 1800/09 · Nav aids2009-09-20 → 2009-09-20
    Nga chart 37057 (2ND ed)
  5. HYDROLANT 1777/09 · Surveys2009-09-18 → 2009-09-18
    Salvage operations in progress until further notice by M/V vos shelter vicinity 54-35.2N 001-25.4E
  6. HYDROLANT 1773/09 · Nav aids2009-09-18 → 2009-09-18
    Nga chart 37055 (0 ed)
  7. HYDROLANT 1752/09 · Nav aids2009-09-15 → 2009-09-15
    Nga chart 35001 (1ST ed)
  8. HYDROLANT 1745/09 · Nav aids2009-09-13 → 2009-09-14
    Nga chart 35035 (0 ed)
  9. HYDROLANT 1713/09 · Surveys2009-09-09 → 2009-09-13
    Salvage operations in progress until further notice by M/V vos shelter vicinity 54-35.2N 001-25.4E
  10. HYDROLANT 1703/09 · Nav aids2009-09-08 → 2009-09-15
    Nga chart 37058 (2ND ed)
  11. HYDROLANT 1701/09 · Other2009-09-08 → 2009-10-20
    Nga chart 37055 (0 ed)
  12. HYDROLANT 1650/09 · Cable ops2009-08-30 → 2009-09-18
    Seismic survey in progress until further notice by M/V finder in area bound by 54-42.8N 000-52.3W, 54-40.4N…
  13. HYDROLANT 1606/09 · Other2009-08-24 → 2009-08-25
    Nga chart 35059 (1ST ed)
  14. HYDROLANT 1603/09 · Nav aids2009-08-24 → 2009-08-24
    Mrcc aberdeen 57-09N 002-05W and mrcc forth 56-16N 002-35W mf dsc inoperative
  15. HYDROLANT 1599/09 · Other2009-08-24 → 2009-08-25
    Nga chart 35013 (0 ed)
  16. HYDROLANT 1586/09 · Nav aids2009-08-20 → 2009-08-22
    Nga chart 35013 (0 ed)
  17. HYDROLANT 1576/09 · Cable ops2009-08-19 → 2009-08-30
    Seismic survey in progress until further notice in area bound by 54-38.0N 000-41.8W, 54-36.2N 000-37.4W,…
  18. HYDROLANT 1572/09 · Nav aids2009-08-19 → 2009-08-28
    Nga chart 37057 (2ND ed)
  19. HYDROLANT 1531/09 · Surveys2009-08-13 → 2009-09-25
    Survey operations in progress until further notice by M/V search in area bound by 53-10.15N 002-34.10E,…
  20. HYDROLANT 1529/09 · Nav aids2009-08-13 → 2009-08-27
    Nga chart 37056 (1ST 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.