North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
7
since 1997
4,732
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 aids2,50353%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,731 cancelled

  1. HYDROLANT 612/01 · Nav aids2001-02-19 → 2001-02-22
    Fog signal at smiths knoll buoy 52-44N 002-18E inoperative
  2. HYDROLANT 604/01 · Nav aids2001-02-19 → 2001-02-19
    Smiths knoll buoy 52-44N 002-18E unlit and fog signal inoperative
  3. HYDROLANT 565/01 · Nav aids2001-02-15 → 2001-03-16
    Fog signal at ruytingen sw buoy 51-05N 001-47E inoperative
  4. HYDROLANT 538/01 · Cable ops2001-02-13 → 2001-02-21
    Underwater operations in progress until further notice by cableship monarch within one mile of 52-11.8N…
  5. HYDROLANT 528/01 · Surveys2001-02-13 → 2001-02-14
    Underwater operations in progress until further notice by M/V pasvik vicinity of trackline joining 51-14N…
  6. HYDROLANT 526/01 · Nav aids2001-02-12 → 2001-02-19
    Fog signal at smiths knoll buoy 52-44N 002-18E inoperative
  7. HYDROLANT 523/01 · Nav aids2001-02-12 → 2001-02-12
    Smiths knoll buoy 52-44N 002-18E unlit
  8. HYDROLANT 517/01 · Surveys2001-02-11 → 2001-02-13
    Underwater operations in progress until further notice by M/V pasvik vicinity of trackline joining 51-20N…
  9. HYDROLANT 512/01 · Surveys2001-02-11 → 2001-02-11
    Underwater operations in progress until further notice by M/V pasvik vicinity of trackline joining 51-31N…
  10. HYDROLANT 504/01 · Derelicts2001-02-10 → 2001-02-17
    Derelict F/V awash and adrift in 59-17.5N 001-14.4W at 102100Z feb
  11. HYDROLANT 498/01 · Other2001-02-10 → 2001-02-15
    Exposed cable marked by buoy, fl y, in 51-36.6N 001-51.0E
  12. HYDROLANT 480/01 · Nav aids2001-02-09 → 2001-02-09
    RACON at cromer light 52-56N 001-19E inoperative 091200Z to 091400Z feb
  13. HYDROLANT 419/01 · Cable ops2001-02-05 → 2001-02-08
    Underwater operations in progress until further notice by cableship peter faber vicinity of trackline…
  14. HYDROLANT 415/01 · Containers2001-02-04 → 2001-02-11
    Nine containers adrift vicinity 57-27.7N 001-38.5W at 042030Z feb
  15. HYDROLANT 379/01 · Nav aids2001-02-01 → 2001-02-01
    RACON at cromer light 52-56N 001-19E off air 010900Z to 011200Z feb
  16. HYDROLANT 355/01 · Cable ops2001-01-30 → 2001-02-01
    Cable operations in progress until further notice by cableship peter faber between 52-18.1N 002-46.9E and…
  17. HYDROLANT 329/01 · Nav aids2001-01-28 → 2001-02-05
    Platform NSR-R3 53-39N 002-57E unlit and fog signal inoperative
  18. HYDROLANT 328/01 · Cable ops2001-01-28 → 2001-02-04
    Underwater operations in progress until further notice by cableship ocean challenger vicinity of trackline…
  19. HYDROLANT 313/01 · Nav aids2001-01-26 → 2001-01-27
    Long sand head buoy 51-48N 001-40E unlit
  20. HYDROLANT 296/01 · Nav aids2001-01-26 → 2001-01-26
    North scroby buoy 52-43N 001-45E unlit

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