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 2378/05 · Surveys2005-12-20 → 2005-12-21
    Survey operations in progress until further notice by M/V triton within one mile of 53-27.5N 002-56.3E
  2. HYDROLANT 2375/05 · Surveys2005-12-19 → 2005-12-20
    Survey operations in progress until further notice by M/V triton within one mile of 53-27.5N 002-56.3E
  3. HYDROLANT 2373/05 · Cable ops2005-12-19 → 2005-12-25
    Underwater operations in progress until further notice by cableship sovereign vicinity 52-17.1N 002-18.3E
  4. HYDROLANT 2356/05 · Nav aids2005-12-17 → 2005-12-20
    Mousa light 59-59.8N 001-09.4W unlit
  5. HYDROLANT 2339/05 · Surveys2005-12-14 → 2005-12-16
    Survey operations in progress until further notice by M/V triton within one mile of 53-27.5N 002-56.3E
  6. HYDROLANT 2338/05 · Surveys2005-12-14 → 2005-12-20
    Underwater operations in progress until further notice by M/V geobay along trackline between 54-01.0N…
  7. HYDROLANT 2337/05 · Other2005-12-13 → 2006-06-07
    Navigation prohibited until further notice within 500 meters of: a. 57-29.33N 000-32.56E
  8. HYDROLANT 2284/05 · Cable ops2005-12-06 → 2005-12-09
    Underwater operations in progress until further notice by cableship peter faber vicinity 59-34.2N 000-35.2W
  9. HYDROLANT 2264/05 · Debris2005-12-04 → 2005-12-05
    Fishing gear adrift in 57-39.55N 000-39.31E
  10. HYDROLANT 2227/05 · Nav aids2005-11-30 → 2005-12-01
    Tod head point light 56-53N 002-13W range unreliable
  11. HYDROLANT 2218/05 · Derelicts2005-11-29 → 2006-01-18
    M/V adrift in 54-29.6N 000-29.0W at 291850Z nov
  12. HYDROLANT 2216/05 · Cable ops2005-11-29 → 2005-12-01
    Underwater operations in progress until further notice by cableship peter faber vicinity 59-38.6N 001-07.8W
  13. HYDROLANT 2206/05 · Nav aids2005-11-28 → 2005-12-04
    CS4 buoy 51-09N 001-34E off station
  14. HYDROLANT 2199/05 · Nav aids2005-11-27 → 2005-11-30
    Mdw buoy 51-19.1N 001-59.4E missing
  15. HYDROLANT 2173/05 · Wrecks2005-11-23 → 2006-08-16
    Dangerous wreck least depth 1.8 meters marked by north cardinal buoy, in 51-29.92N 000-29.59E
  16. HYDROLANT 2136/05 · Other2005-11-20 → 2005-11-20
    Unexploded ordnance marked by two buoys within one mile of 51-23.7N 001-31.5E
  17. HYDROLANT 2122/05 · Cable ops2005-11-18 → 2005-11-21
    Underwater operations in progress until further notice by cableship peter faber vicinity 59-38.8N 001-08.3W
  18. HYDROLANT 2033/05 · Wrecks2005-11-05 → 2006-09-20
    19.9 meter shoal in 51-16.77N 002-07.48E
  19. HYDROLANT 2032/05 · Nav aids2005-11-05 → 2005-11-07
    Sw shipwash buoy 51-55N 001-34E unlit
  20. HYDROLANT 2009/05 · Surveys2005-11-03 → 2005-11-11
    Underwater operations in progress until further notice by M/V island frontier vicinity 58-16.9N 000-14.2E

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