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 225/16 · Other2016-01-26 → 2016-03-09
    All navigational aids at meteorological mast 56-26.4N 002-14.5W unreliable
  2. HYDROLANT 221/16 · Other2016-01-26 → 2016-01-27
    All navigational aids at platforms within seven miles of 53-27N 002-20E unreliable
  3. HYDROLANT 215/16 · Other2016-01-25 → 2016-01-26
    All navigational aids at platforms within 4.5 miles of 53-27N 002-20E unreliable
  4. HYDROLANT 179/16 · Nav aids2016-01-21 → 2016-01-21
    Stirling dgps station 56-04N 004-04W off air
  5. HYDROLANT 146/16 · Cable ops2016-01-17 → 2016-01-21
    Underwater operations in progress until further notice by cableship pierre de fermat with submersible…
  6. HYDROLANT 138/16 · Nav aids2016-01-16 → 2016-01-18
    All navigational aids at platform 49/22-JD, 53-19.7N 002-21.8E inoperative
  7. HYDROLANT 112/16 · Nav aids2016-01-13 → 2016-01-21
    Platform 44/23 a-cm, 54-12.2N 002-27.1E unlit and fog signal inoperative
  8. HYDROLANT 110/16 · Other2016-01-13 → 2016-01-19
    All navigational aids at meteorological mast 52-12.9N 002-30.1E inoperative
  9. HYDROLANT 97/16 · Nav aids2016-01-12 → 2016-01-13
    Meteorological mast 52-12.9N 002-30.1E unlit and fog signal inoperative
  10. HYDROLANT 95/16 · Nav aids2016-01-12 → 2016-01-14
    All navigational aids at platform 49/30-A, 53-00.3N 002-53.8E inoperative
  11. HYDROLANT 83/16 · Nav aids2016-01-10 → 2016-03-01
    All navigational aids at platform 11/30-B, 58-08.9N 003-01.3W inoperative
  12. HYDROLANT 66/16 · Nav aids2016-01-07 → 2016-01-08
    Dgps station at sumburgh head light 59-51.2N 001-16.5W off air
  13. HYDROLANT 61/16 · Nav aids2016-01-06 → 2016-01-09
    Auskerry light 59-01.5N 002-34.3W unreliable
  14. HYDROLANT 59/16 · Nav aids2016-01-06 → 2016-01-16
    Southwold light 52-19.6N 001-40.9E range temporarily reduced to 12 miles
  15. HYDROLANT 52/16 · Other2016-01-05 → 2016-01-13
    All navigational aids at meteorological mast 56-26.4N 002-14.5W inoperative
  16. HYDROLANT 37/16 · Nav aids2016-01-03 → 2016-01-04
    Dgps station at sumburgh head light 59-51.2N 001-16.5W off air
  17. HYDROLANT 30/16 · Nav aids2016-01-03 → 2016-01-03
    Dgps station at sumburgh head light 59-51.2N 001-16.5W off air
  18. HYDROLANT 27/16 · Nav aids2016-01-03 → 2016-01-03
    Dgps station at sumburgh head light 59-51.2N 001-16.5W unreliable
  19. HYDROLANT 24/16 · Nav aids2016-01-02 → 2016-01-10
    All navigational aids at platform 11/30-B, 58-08.9N 003-01.3W inoperative
  20. HYDROLANT 3231/15 · Nav aids2015-12-31 → 2015-12-31
    All navigational aids at platform 49/22-JD, 53-19.7N 002-21.8E inoperative

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