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 1524/09 · Cable ops2009-08-13 → 2009-08-13
    Seismic survey in progress until further notice by M/V veritas towing six 6000 meter long cables in area…
  2. HYDROLANT 1505/09 · Nav aids2009-08-10 → 2009-09-21
    Nga chart 35055 (1ST ed)
  3. HYDROLANT 1482/09 · Cable ops2009-08-06 → 2009-08-14
    Underwater operations in progress until further notice by cableship leon thevenin with submersible vicinity…
  4. HYDROLANT 1438/09 · Cable ops2009-07-31 → 2009-08-19
    Seismic survey in progress until further notice in area bound by 54-32.9N 000-42.4W, 54-36.5N 000-38.1W,…
  5. HYDROLANT 1408/09 · Nav aids2009-07-29 → 2009-07-30
    Nga chart 37140 (33RD ed)
  6. HYDROLANT 1407/09 · Nav aids2009-07-29 → 2009-07-29
    Nga chart 37120 (3RD ed)
  7. HYDROLANT 1399/09 · Nav aids2009-07-27 → 2009-07-29
    Nga chart 35050 (1ST ed)
  8. HYDROLANT 1396/09 · Other2009-07-27 → 2009-08-08
    Pipelaying operations in progress until further notice by M/V castroro sei vicinity of trackline joining…
  9. HYDROLANT 1388/09 · Nav aids2009-07-27 → 2009-07-27
    Nga chart 35035 (0 ed)
  10. HYDROLANT 1277/09 · Nav aids2009-07-09 → 2009-08-02
    Nga chart 37057 (2ND ed)
  11. HYDROLANT 1252/09 · Nav aids2009-07-06 → 2009-07-09
    Nga chart 37028 (0 ed)
  12. HYDROLANT 1242/09 · Surveys2009-07-04 → 2009-07-08
    Survey operations in progress until 072359Z jul by M/V pegase and M/V sagittaire within ten miles of…
  13. HYDROLANT 1230/09 · Nav aids2009-07-02 → 2009-07-03
    Nga chart 35058 (1ST ed)
  14. HYDROLANT 1184/09 · Nav aids2009-06-25 → 2009-07-07
    Nga chart 37057 (2ND ed)
  15. HYDROLANT 1168/09 · Other2009-06-23 → 2009-06-27
    Fishing net with floats adrift in 60-23.8N 000-30.9E at 231431Z jun
  16. HYDROLANT 1157/09 · Nav aids2009-06-22 → 2009-06-23
    Nga chart 37166 (3RD ed)
  17. HYDROLANT 1140/09 · Cable ops2009-06-20 → 2009-06-23
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 58-35.1N 002-37.6W
  18. HYDROLANT 1131/09 · Nav aids2009-06-19 → 2009-06-19
    Mrcc shetland 60-09N 001-08W dsc services inoperative
  19. HYDROLANT 1096/09 · Surveys2009-06-14 → 2009-07-13
    Underwater operations in progress until further notice by barge excalibur in area bound by 53-24N 000-59E,…
  20. HYDROLANT 1088/09 · Other2009-06-13 → 2009-08-01
    Nga chart 37223 (14TH 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.