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 2257/06 · Surveys2006-12-16 → 2006-12-29
    Underwater operations in progress until further notice by M/V vos sympathy vicinity 52-59N 002-58E
  2. HYDROLANT 2228/06 · Surveys2006-12-12 → 2007-02-08
    Underwater operations in progress until further notice by M/V resolution along trackline between 51-34.6N…
  3. HYDROLANT 2202/06 · Surveys2006-12-09 → 2006-12-10
    Underwater operations in progress until further notice by M/V vos sympathy vicinity 52-58.9N 002-58.4E
  4. HYDROLANT 2175/06 · Wrecks2006-12-05 → 2008-02-09
    Submerged obstruction vicinity 59-09.4N 002-49.5W
  5. HYDROLANT 2171/06 · Nav aids2006-12-04 → 2006-12-15
    Platform 54-12.2N 002-27.1E all navigational aids inoperative
  6. HYDROLANT 2167/06 · Nav aids2006-12-04 → 2007-01-23
    Kinnairds head light 57-41.9N 002-00.1W range temporarily reduced to 16 miles
  7. HYDROLANT 2155/06 · Wrecks2006-12-02 → 2006-12-04
    Submerged obstruction vicinity 59-09.4N 002-49.5W
  8. HYDROLANT 2153/06 · Nav aids2006-12-02 → 2006-12-02
    Platform 58-00.1N 000-23.0W all navigational aids inoperative
  9. HYDROLANT 2123/06 · Nav aids2006-11-26 → 2006-11-27
    Dyck buoy 51-03.0N 001-51.8E missing
  10. HYDROLANT 2101/06 · Nav aids2006-11-20 → 2006-11-22
    Kinnairds head light 57-41.9N 002-00.1W unreliable 1500Z to 2359Z daily 20 and 21 nov
  11. HYDROLANT 2093/06 · Surveys2006-11-19 → 2006-11-20
    Survey operations in progress until further notice by M/V multraship commander towing 100 meter long cable…
  12. HYDROLANT 2063/06 · Nav aids2006-11-13 → 2008-02-09
    Coquet light 55-20.0N 001-32.2W temporarily changed to: FL(3) w 20 sec 9 miles
  13. HYDROLANT 2009/06 · Wrecks2006-11-02 → 2008-02-09
    Dangerous wreck reported in 56-32.95N 002-32.52W
  14. HYDROLANT 1927/06 · Cable ops2006-10-19 → 2007-02-08
    Seismic survey in progress until further notice by M/V northern explorer towing 8100 meter long cable in…
  15. HYDROLANT 1923/06 · Nav aids2006-10-19 → 2008-02-09
    Amethyst gas field (53-27N 000-45E) platforms A1D, A2D, B1D and C1D all navaids inoperative
  16. HYDROLANT 1876/06 · Surveys2006-10-13 → 2006-10-16
    Underwater operations in progress until further notice by M/V vos sympathy vicinity 52-58.9N 002-58.4E
  17. HYDROLANT 1854/06 · Other2006-10-09 → 2006-10-20
    Pipelaying operations in progress until further notice by M/V apache vicinity of trackline between 53-49.4N…
  18. HYDROLANT 1847/06 · Other2006-10-08 → 2006-10-09
    Pipelaying operations in progress until further notice by M/V apache vicinity of trackline between 53-47.0N…
  19. HYDROLANT 1831/06 · Cable ops2006-10-05 → 2006-10-12
    Seismic survey in progress until further notice by M/V sea trident within three miles of 53-02N 002-41E
  20. HYDROLANT 1826/06 · Nav aids2006-10-05 → 2006-10-05
    Platform 52-59.1N 002-44.1E unlit

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