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 555/15 · Surveys2015-03-07 → 2015-05-06
    Underwater operations in progress until further notice by M/V constructor with submersible vicinity 53-09.6N…
  2. HYDROLANT 481/15 · Nav aids2015-02-27 → 2015-02-28
    RACON at dudgeon buoy 53-16.6N 001-17.0E inoperative
  3. HYDROLANT 478/15 · Nav aids2015-02-26 → 2015-04-09
    All navigational aids at katy platform 54-24.1N 002-39.3E inoperative
  4. HYDROLANT 477/15 · Nav aids2015-02-26 → 2015-03-13
    All navigational aids at vampire platform, 53-28.0N 002-02.6E inoperative
  5. HYDROLANT 467/15 · Nav aids2015-02-25 → 2015-02-25
    Kinnairds head light 57-41.9N 002-00.1W unreliable
  6. HYDROLANT 443/15 · Nav aids2015-02-22 → 2015-02-23
    Isle of may light 56-11.2N 002-33.3W unreliable
  7. HYDROLANT 442/15 · Nav aids2015-02-22 → 2015-02-24
    All navigational aids at platform 49/30-A, 53-00.3N 002-53.8E inoperative
  8. HYDROLANT 441/15 · Nav aids2015-02-22 → 2015-02-25
    All navigational aids at platform 49/23-D 53-18.2N 002-30.0E inoperative
  9. HYDROLANT 434/15 · Nav aids2015-02-20 → 2015-03-15
    All navigational aids at platform 49/17-HD, 53-29.8N 002-19.4E inoperative
  10. HYDROLANT 411/15 · Nav aids2015-02-17 → 2015-02-24
    Ruytingen sw buoy relocated to 51-04.2N 001-45.5E
  11. HYDROLANT 408/15 · Nav aids2015-02-16 → 2015-02-17
    Skroo light 59-33.2N 001-36.5W unreliable
  12. HYDROLANT 396/15 · Other2015-02-15 → 2015-02-27
    Navigation prohibited until further notice unless authorized by mrcc shetland within two miles of 58-40.2N…
  13. HYDROLANT 393/15 · Nav aids2015-02-15 → 2015-03-10
    All navigational aids at platform 44/17-MH 54-26.1N 002-18.0E inoperative
  14. HYDROLANT 377/15 · Other2015-02-13 → 2015-03-28
    Humber lightfloat 53-39.1N 000-20.0E temporarily replaced by buoy, green, lfl g 10 sec
  15. HYDROLANT 365/15 · Nav aids2015-02-12 → 2015-04-02
    Light and fog signal at meteorological mast 51-56.6N 001-55.3E discontinued
  16. HYDROLANT 363/15 · Nav aids2015-02-12 → 2015-02-12
    Fog signal at platform 49/27-H, 53-00.3N 002-12.9E inoperative
  17. HYDROLANT 361/15 · Cable ops2015-02-12 → 2015-04-16
    Seismic survey in progress until further notice by M/V polar duchess towing ten 6000 meter long cables in…
  18. HYDROLANT 343/15 · Surveys2015-02-10 → 2015-02-15
    Underwater operations in progress until further notice by M/V protea with submersible in: a. 52-59.8N…
  19. HYDROLANT 330/15 · Nav aids2015-02-09 → 2015-02-10
    Loran-c station sylt (54-48N 008-18E), rates 7499-X, 7499-Y and 6731 z, off air 100730 to 100830Z feb, 2.…
  20. HYDROLANT 326/15 · Nav aids2015-02-08 → 2015-02-11
    All navigational aids at platform 49/11A-PWD, 53-32.4N 002-00.9E 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.