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 2098/09 · Nav aids2009-10-29 → 2009-10-29
    Nga chart 37057 (2ND ed)
  2. HYDROLANT 2093/09 · Nav aids2009-10-28 → 2009-10-29
    Nga chart 35056 (1ST ed)
  3. HYDROLANT 2088/09 · Nav aids2009-10-28 → 2009-10-28
    Dsc station noss head 58-29N 003-03W unusable
  4. HYDROLANT 2086/09 · Other2009-10-27 → 2009-10-27
    Port of buckie (57-40.8N 002-57.6W) closed until further notice
  5. HYDROLANT 2082/09 · Nav aids2009-10-27 → 2009-10-27
    Copinsay light 58-53.8N 002-40.2W unlit
  6. HYDROLANT 2081/09 · Nav aids2009-10-27 → 2009-11-08
    Nga chart 37057 (2ND ed)
  7. HYDROLANT 2074/09 · Other2009-10-25 → 2009-10-29
    Bombing exercises 1200Z to 1300Z and 1600Z to 1700Z daily 26 thru 29 oct within four miles of tracklines…
  8. HYDROLANT 2068/09 · Nav aids2009-10-25 → 2009-10-27
    Dsc station noss head 58-29N 003-03W unusable
  9. HYDROLANT 2023/09 · Nav aids2009-10-19 → 2009-10-22
    Nga chart 37057 (2ND ed)
  10. HYDROLANT 2004/09 · Other2009-10-16 → 2009-10-17
    Nga chart 35001 (1ST ed)
  11. HYDROLANT 1995/09 · Cable ops2009-10-15 → 2009-10-22
    Underwater operations in progress until further notice by cableship wave sentinel vicinity 54-43N 000-43W
  12. HYDROLANT 1973/09 · Nav aids2009-10-11 → 2009-10-12
    Nga chart 37058 (2ND ed)
  13. HYDROLANT 1951/09 · Other2009-10-08 → 2009-10-10
    Nga chart 35046 (0 ed)
  14. HYDROLANT 1950/09 · Cable ops2009-10-08 → 2009-10-11
    Seismic survey in progress until further notice by M/V northern genesis towing 8500 meter long cable in area…
  15. HYDROLANT 1929/09 · Other2009-10-06 → 2009-10-06
    Nga chart 35068 (1ST ed)
  16. HYDROLANT 1895/09 · Nav aids2009-10-01 → 2009-10-04
    Nga chart 35059 (1ST ed)
  17. HYDROLANT 1888/09 · Surveys2009-09-30 → 2009-10-05
    Salvage operations in progress until further notice within 500 meters of 52-21.0N 001-43.5E
  18. HYDROLANT 1865/09 · Nav aids2009-09-27 → 2009-09-28
    Nga chart 35061 (2ND ed)
  19. HYDROLANT 1854/09 · Surveys2009-09-25 → 2009-09-30
    Salvage operations in progress until further notice within 500 meters of 52-17.6N 001-45.2E
  20. HYDROLANT 1831/09 · Other2009-09-23 → 2009-09-24
    Dsc stations saxavord hill 60-50N 000-50W, collafirth hill 60-32N 001-23W, compass head 59-52N 001-16W,…

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