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 212/07 · Nav aids2007-02-07 → 2007-02-09
    Hinder one buoy 51-20.8N 002-11.0E missing
  2. HYDROLANT 199/07 · Other2007-02-05 → 2007-02-20
    Pipelaying operations in progress until further notice by M/V acergy falcon along trackline between 54-19.5N…
  3. HYDROLANT 176/07 · Nav aids2007-02-01 → 2007-02-07
    Hinder one buoy 51-20.8N 002-11.0E unlit
  4. HYDROLANT 146/07 · Nav aids2007-01-25 → 2007-12-02
    Holm sand lightbuoy 52-33N 001-47E unlit
  5. HYDROLANT 144/07 · Exercises2007-01-25 → 2007-01-25
    Hazardous operations 251330Z to 251530Z jan in area bound by 56-04N 001-55E, 56-06N 000-29W, 56-18N 001-25W,…
  6. HYDROLANT 142/07 · Exercises2007-01-24 → 2007-01-24
    Hazardous operations 241200Z to 241500Z jan in area bound by 56-04N 001-55E, 56-06N 000-29W, 56-18N 001-25W,…
  7. HYDROLANT 139/07 · Nav aids2007-01-23 → 2007-01-30
    Kinnairds head light 57-41.9N 002-00.1W, range temporarily changed to 20 miles
  8. HYDROLANT 133/07 · Exercises2007-01-22 → 2007-01-22
    Hazardous operations in progress until 221430Z jan in area bound by 56-04N 001-55E, 56-06N 000-29W, 56-18N…
  9. HYDROLANT 132/07 · Nav aids2007-01-22 → 2007-02-02
    Shell 17 buoy 53-13.69N 002-48.72E unlit
  10. HYDROLANT 53/07 · Nav aids2007-01-10 → 2007-01-19
    Ness of sound light 60-31.4N 001-11.1W unlit
  11. HYDROLANT 45/07 · Nav aids2007-01-08 → 2007-02-19
    North cardinal buoy 55-52.80N 002-05.25W unlit
  12. HYDROLANT 29/07 · Nav aids2007-01-05 → 2007-01-08
    North cardinal buoy 55-52.80N 002-05.25W missing
  13. HYDROLANT 28/07 · Nav aids2007-01-05 → 2007-12-02
    Platform 49/17-HD 53-29.7N 002-19.4E all aids unlit
  14. HYDROLANT 22/07 · Other2007-01-04 → 2007-01-05
    Duncansby head light 58-38.7N 003-01.5W at reduced intensity
  15. HYDROLANT 11/07 · Nav aids2007-01-03 → 2007-02-01
    Skroo light 59-33N 001-37W unlit
  16. HYDROLANT 2320/06 · Containers2006-12-29 → 2007-01-06
    18 containers adrift 59-09.2N 002-16.9W at 291450Z dec
  17. HYDROLANT 2304/06 · Nav aids2006-12-26 → 2008-02-09
    Fog signal at cockle buoy 52-44.0N 001-43.6E discontinued
  18. HYDROLANT 2298/06 · Wrecks2006-12-24 → 2008-02-09
    Significant reduced depths reported vicinity of scroby elbow buoy 52-37.3N 001-46.3E
  19. HYDROLANT 2297/06 · Nav aids2006-12-24 → 2006-12-24
    Orfordness light 52-05.05N 001-34.5E fixed red sector unlit
  20. HYDROLANT 2287/06 · Nav aids2006-12-22 → 2007-01-15
    Ruytingen east buoy 51-14.5N 002-18.0E 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.