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 587/17 · Nav aids2017-02-21 → 2017-04-04
    Platform 48/10-ND, 53-43.5N 001-53.9E unlit
  2. HYDROLANT 581/17 · Nav aids2017-02-20 → 2017-04-03
    Cgoc aberdeen mf dsc and r/t services at greg ness 57-07.6N 002-03.2W off air
  3. HYDROLANT 567/17 · Cable ops2017-02-18 → 2017-02-21
    Underwater operations in progress until further notice by cableship wave sentinel with submersible in…
  4. HYDROLANT 553/17 · Other2017-02-17 → 2017-03-25
    Unexploded ordnance in 51-18.81N 002-16.62E
  5. HYDROLANT 544/17 · Nav aids2017-02-17 → 2017-02-20
    All navigational aids at platform 49/23E, 53-11.9N 002-29.1E inoperative
  6. HYDROLANT 543/17 · Cable ops2017-02-17 → 2017-02-18
    Underwater operations in progress until further notice by cableship wave sentinel with submersible in…
  7. HYDROLANT 526/17 · Surveys2017-02-15 → 2017-04-18
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity…
  8. HYDROLANT 522/17 · Wrecks2017-02-15 → 2017-03-29
    Dangerous wreck, least depth 10 meters, in 52-06.1N 001-38.0E
  9. HYDROLANT 517/17 · Other2017-02-15 → 2017-02-15
    Mine clearing operations 150800Z to 151800Z feb in area within 3000 meters of 51-19.32N 002-06.15E
  10. HYDROLANT 503/17 · Nav aids2017-02-14 → 2017-02-15
    Dgps station at sumburgh head light 59-51.3N 001-16.4W off air
  11. HYDROLANT 489/17 · Surveys2017-02-12 → 2017-02-15
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity…
  12. HYDROLANT 487/17 · Other2017-02-12 → 2017-02-13
    All navigational aids at meteorological mast 53-10.6N 002-59.1E unreliable
  13. HYDROLANT 486/17 · Other2017-02-12 → 2017-03-25
    Unexploded ordnance in 51-19.37N 002-11.40E
  14. HYDROLANT 480/17 · Nav aids2017-02-11 → 2017-02-20
    All navigational aids at platform 48/13-PB, 53-36.8N 001-31.5E inoperative
  15. HYDROLANT 448/17 · Surveys2017-02-09 → 2017-02-12
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity…
  16. HYDROLANT 417/17 · Nav aids2017-02-06 → 2017-02-15
    Fog signal at platform 12/21C jacky, 58-11.0N 002-58.8W inoperative
  17. HYDROLANT 409/17 · Nav aids2017-02-06 → 2017-02-06
    Stirling dgps station 56-04N 004-04W off air
  18. HYDROLANT 385/17 · Nav aids2017-02-04 → 2017-02-04
    Fog signal at flamborough head light 54-07N 000-05W unreliable
  19. HYDROLANT 364/17 · Surveys2017-02-03 → 2017-02-08
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity…
  20. HYDROLANT 358/17 · Surveys2017-02-02 → 2017-02-03
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity…

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