North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
6
since 1997
4,730
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%
Other66814%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,729 cancelled

  1. HYDROLANT 756/17 · Nav aids2017-03-07 → 2017-03-08
    Skroo light 59-33.1N 001-36.6W unlit
  2. HYDROLANT 746/17 · Surveys2017-03-07 → 2017-03-07
    Underwater operations 070700Z to 071800Z mar in area bound by 51-19.3N 002-06.1E, 51-19.4N 002-11.4E,…
  3. HYDROLANT 742/17 · Nav aids2017-03-06 → 2017-03-09
    Hoo stack light 60-15.0N 001-05.4W unlit
  4. HYDROLANT 726/17 · Other2017-03-04 → 2017-04-15
    Unexploded ordnance in 51-19.31N 001-56.12E
  5. HYDROLANT 719/17 · Nav aids2017-03-04 → 2017-03-06
    All navigational aids at platform 44/23 a-cm, 54-12.2N 002-27.1E inoperative
  6. HYDROLANT 701/17 · Nav aids2017-03-03 → 2017-04-14
    Fog signal at wind turbines inoperative in: a. 53-10.4N 001-04.8E
  7. HYDROLANT 695/17 · Nav aids2017-03-03 → 2017-03-03
    Stirling dgps station 56-04N 004-04W off air 030745Z to 031730Z mar
  8. HYDROLANT 687/17 · Derelicts2017-03-02 → 2017-03-05
    Derelict 13 meter S/V adrift in vicinity 59-47.5N 001-29.7E at 021320Z mar
  9. HYDROLANT 680/17 · Nav aids2017-03-01 → 2017-03-02
    Stirling dgps station 56-04N 004-04W off air 020745Z to 021730Z mar
  10. HYDROLANT 679/17 · Derelicts2017-03-01 → 2017-03-02
    Derelict 13 meter S/V adrift in vicinity 59-33.0N 001-03.5E at 011735Z mar
  11. HYDROLANT 676/17 · Derelicts2017-03-01 → 2017-03-01
    Derelict 13 meter S/V adrift in 59-30.8N 001-01.7E at 011445Z mar
  12. HYDROLANT 664/17 · Derelicts2017-02-28 → 2017-03-01
    Derelict 13 meter S/V adrift in 59-38.9N 000-26.1E at 281845Z feb
  13. HYDROLANT 657/17 · Nav aids2017-02-28 → 2017-04-09
    Scurdie ness light 56-42.1N 002-26.3W range temporarily reduced to 12 miles
  14. HYDROLANT 650/17 · Nav aids2017-02-27 → 2017-02-27
    Stirling dgps station 56-04N 004-04W off air 270730Z to 271730Z feb
  15. HYDROLANT 645/17 · Nav aids2017-02-26 → 2017-04-09
    Tarbat ness light 57-51.9N 003-46.6W range temporarily reduced to 12 miles
  16. HYDROLANT 631/17 · Wrecks2017-02-24 → 2017-04-07
    Dangerous wreck marked by lighted buoys in 51-40.21N 002-13.55E
  17. HYDROLANT 630/17 · Surveys2017-02-24 → 2017-03-21
    Underwater operations in progress until further notice by M/V havila phoenix in vicinity of trackline…
  18. HYDROLANT 615/17 · Wrecks2017-02-23 → 2017-02-24
    Dangerous wreck marked by lighted buoys in 51-40.21N 002-13.55E
  19. HYDROLANT 604/17 · Wrecks2017-02-22 → 2017-02-23
    Dangerous wreck marked by lighted buoys in 51-40.21N 002-13.55E
  20. HYDROLANT 588/17 · Nav aids2017-02-21 → 2017-04-18
    Offshore wind farm construction area marked by buoys established in: a. east cardinal light-buoy, 58-18.0N…

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