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 104/15 · Nav aids2015-01-13 → 2015-01-13
    Duncansby head light 58-38.7N 003-01.5W unreliable
  2. HYDROLANT 101/15 · Nav aids2015-01-12 → 2015-01-15
    Auskerry light 59-01.6N 002-34.2W unlit
  3. HYDROLANT 99/15 · Other2015-01-12 → 2015-01-22
    All navigational aids at platforms inoperative: a. 49/16-ED, 53-26.0N 002-09.3E
  4. HYDROLANT 97/15 · Nav aids2015-01-12 → 2015-01-21
    All navigational aids at platform 48/15B-PXW, 53-34.1N 001-58.2E inoperative
  5. HYDROLANT 96/15 · Nav aids2015-01-12 → 2015-02-15
    All navigational aids at katy platform 54-24.1N 002-39.3E inoperative
  6. HYDROLANT 89/15 · Nav aids2015-01-11 → 2015-01-12
    Firths voe light 60-27.2N 001-10.6W unreliable
  7. HYDROLANT 88/15 · Nav aids2015-01-11 → 2015-01-12
    Duncansby head light 58-38.7N 003-01.5W unreliable
  8. HYDROLANT 84/15 · Containers2015-01-11 → 2015-01-14
    Container adrift vicinity 58-07.0N 004-37.2E at 102120Z jan
  9. HYDROLANT 47/15 · Nav aids2015-01-06 → 2015-02-17
    Ruytingen sw buoy 51-04.3N 001-45.8E off station
  10. HYDROLANT 46/15 · Nav aids2015-01-06 → 2015-03-13
    All navigational aids at platform 49/17-CD, 53-25.4N 002-22.5E inoperative
  11. HYDROLANT 37/15 · Other2015-01-05 → 2015-02-15
    Navigation prohibited until further notice unless authorized by mrcc shetland within two miles of 58-40.2N…
  12. HYDROLANT 34/15 · Nav aids2015-01-05 → 2015-01-13
    Southern North Sea
  13. HYDROLANT 30/15 · Nav aids2015-01-04 → 2015-01-06
    Copinsay light 58-53.8N 002-40.2W unlit
  14. HYDROLANT 7/15 · Other2015-01-02 → 2015-02-13
    Humber lightfloat 53-38.7N 000-21.2E temporarily replaced by buoy, green, lfl g 10 sec
  15. HYDROLANT 1/15 · Nav aids2015-01-01 → 2015-02-12
    Fog signal at platform 49/27-H, 53-00.3N 002-12.9E inoperative
  16. HYDROLANT 3167/14 · Other2014-12-30 → 2015-01-06
    All navigational aids at platforms inoperative: a. 49/17-DD, 53-26.4N 002-23.6E
  17. HYDROLANT 3151/14 · Nav aids2014-12-27 → 2015-01-17
    Cancel HYDROLANT 3142/14(36), aid restored
  18. HYDROLANT 3133/14 · Other2014-12-25 → 2014-12-31
    Pipelaying operations in progress until further notice by M/V deep energy vicinity of trackline between…
  19. HYDROLANT 3130/14 · Other2014-12-23 → 2015-04-02
    Meteorological mast established in 56-26.40N 002-14.49W
  20. HYDROLANT 3119/14 · Nav aids2014-12-22 → 2015-02-02
    All navigational aids at platform 48/25-PUR, 53-14.4N 001-58.2E 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.