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 842/07 · Cable ops2007-05-19 → 2007-06-12
    Pipeline operations in progress until further notice by M/V skandinavica along trackline between 57-28.1N…
  2. HYDROLANT 824/07 · Nav aids2007-05-16 → 2008-02-09
    Inner voder light and RACON 60-16.50N 001-04.90W permanently discontinued
  3. HYDROLANT 805/07 · Cable ops2007-05-14 → 2007-05-15
    Pipeline operations in progress until further notice by cableship apache in vicinity of trackline between…
  4. HYDROLANT 793/07 · Nav aids2007-05-12 → 2007-06-06
    Skroo light 59-33.2N 001-36.5W range temporarily reduced to ten miles
  5. HYDROLANT 790/07 · Other2007-05-11 → 2008-02-09
    Unexploded ordnance in 53-11.54N 002-34.71E
  6. HYDROLANT 773/07 · Nav aids2007-05-09 → 2007-05-09
    Stirling dgps station 56-04N 004-04W off air 090930Z to 091230Z may
  7. HYDROLANT 701/07 · Other2007-04-27 → 2007-06-08
    Unexploded ordnance in 52-32.12N 002-43.22E
  8. HYDROLANT 677/07 · Cable ops2007-04-23 → 2007-05-14
    Pipeline operations in progress until further notice by M/V cso apache vicinity of trackline between 56-26N…
  9. HYDROLANT 623/07 · Exercises2007-04-16 → 2007-04-19
    Hazardous operations 1415Z to 1515Z daily 16 thru 19 apr in area bound by 55-02N 001-00W, 55-20N 001-07W,…
  10. HYDROLANT 621/07 · Exercises2007-04-15 → 2007-04-20
    Hazardous operations 0900Z to 0930Z and 1300Z to 1330Z daily 16 thru 19 april and 200900Z to 200930Z apr in…
  11. HYDROLANT 607/07 · Cable ops2007-04-13 → 2007-04-13
    Underwater operations in progress until further notice by cableship sovereign vicinity 52-23.8N 002-34.5E
  12. HYDROLANT 597/07 · Cable ops2007-04-11 → 2008-02-09
    Seismic survey in progress until further notice by M/V akademik lazarev towing 8500 meter long cable in area…
  13. HYDROLANT 555/07 · Surveys2007-04-06 → 2007-04-10
    Underwater operations in progress until further notice by M/V vos sympathy with divers in 53-05.13N 001-51.04E
  14. HYDROLANT 512/07 · Other2007-03-30 → 2007-05-11
    Unexploded ordnance in 53-11.54N 002-34.76E
  15. HYDROLANT 454/07 · Nav aids2007-03-21 → 2007-12-02
    Dyck buoy 51-03.0N 001-51.8E unlit
  16. HYDROLANT 452/07 · Nav aids2007-03-21 → 2007-12-02
    Ruytingen west lightbuoy 51-06.9N 001-50.4E missing
  17. HYDROLANT 395/07 · Nav aids2007-03-14 → 2007-03-15
    Mrcc aberdeen 57-39N 002-14W mf dsc services inoperative
  18. HYDROLANT 369/07 · Nav aids2007-03-10 → 2007-03-11
    Fog signal at east goodwin lightfloat 51-13.0N 001-36.3E unreliable
  19. HYDROLANT 359/07 · Nav aids2007-03-08 → 2007-04-17
    North quern buoy 51-19.4N 001-26.1E off station
  20. HYDROLANT 356/07 · Nav aids2007-03-07 → 2007-03-30
    Ruytingen sw buoy 51-05N 001-47E missing

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