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 887/15 · Nav aids2015-04-14 → 2015-04-15
    NAVTEX station cullercoats 55-04N 001-28W off air
  2. HYDROLANT 863/15 · Nav aids2015-04-12 → 2015-05-02
    Sumburgh head light 59-51.2N 001-16.5W unreliable
  3. HYDROLANT 862/15 · Nav aids2015-04-12 → 2015-04-12
    Dgps station at sumburgh head light 59-51.2N 001-16.5W unreliable
  4. HYDROLANT 844/15 · Cable ops2015-04-10 → 2015-06-28
    Seismic survey in progress until further notice by M/V ramform atlas towing 12 9000 meter long cables in…
  5. HYDROLANT 836/15 · Nav aids2015-04-09 → 2015-04-22
    All navigational aids at katy platform 54-24.2N 002-39.6E inoperative
  6. HYDROLANT 835/15 · Cable ops2015-04-09 → 2015-04-10
    Seismic survey in progress until further notice by M/V ramform atlas towing 12 9000 meter long cables in…
  7. HYDROLANT 810/15 · Nav aids2015-04-07 → 2015-04-14
    All navigational aids at platform 42/30-ST3 54-04.4N 000-54.9E inoperative
  8. HYDROLANT 779/15 · Cable ops2015-04-03 → 2015-08-19
    Seismic survey in progress until further notice by M/V artemis athene in area bound by 58-24.3N 001-54.3W,…
  9. HYDROLANT 737/15 · Other2015-03-28 → 2015-04-28
    Humber lightfloat 53-39.1N 000-20.0E temporarily replaced by buoy, green, lfl g 10 sec
  10. HYDROLANT 679/15 · Nav aids2015-03-20 → 2015-05-01
    Fog signal at platform 44/22-MA, 54-16.1N 002-19.3E inoperative
  11. HYDROLANT 676/15 · Nav aids2015-03-20 → 2015-03-21
    Black deep buoy 1 51-44.0N 001-28.1E unlit
  12. HYDROLANT 664/15 · Nav aids2015-03-18 → 2015-05-16
    Longstone light 55-38.6N 001-36.5W temporarily replaced by longstone lightship 55-39.39N 001-34.66W, FL(2)…
  13. HYDROLANT 663/15 · Cable ops2015-03-18 → 2015-07-18
    Underwater operations in progress by cableship cable innovator vicinity of trackline joining 59-34.3N…
  14. HYDROLANT 638/15 · Cable ops2015-03-16 → 2015-04-09
    Seismic survey in progress until further notice by M/V ramform atlas towing 12 9000 meter long cables in…
  15. HYDROLANT 636/15 · Cable ops2015-03-16 → 2015-05-18
    Seismic survey in progress until further notice by M/V ramform vanguard towing 12 6000 meter long cables in…
  16. HYDROLANT 629/15 · Nav aids2015-03-15 → 2015-03-24
    All navigational aids at platform 49/17-HD, 53-29.8N 002-19.4E inoperative
  17. HYDROLANT 605/15 · Cable ops2015-03-13 → 2015-03-15
    Cable laying operations in progress until further notice by cableship apache 2 vicinity of trackline between…
  18. HYDROLANT 595/15 · Nav aids2015-03-11 → 2015-03-11
    Dgps station at sumburgh head light 59-51.3N 001-16.3W unreliable
  19. HYDROLANT 570/15 · Other2015-03-09 → 2015-06-06
    Navigation prohibited within 500 meters of: a. 57-25.16N 001-13.80E
  20. HYDROLANT 558/15 · Surveys2015-03-07 → 2015-03-11
    Underwater operations in progress until further notice by M/V atlantic explorer with submersible 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.