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 2119/99 · Surveys1999-10-06 → 1999-10-06
    Underwater operations in progress until 060700Z oct by M/V goosander between 51-23N 001-44E and 51-23N 002-25E
  2. HYDROLANT 2117/99 · Surveys1999-10-05 → 1999-10-06
    Underwater operations in progress until further notice by M/V goosander and M/V northern admiral vicinity…
  3. HYDROLANT 2116/99 · Nav aids1999-10-05 → 1999-10-05
    Sunk lightfloat 51-51N 001-35E removed
  4. HYDROLANT 2104/99 · Surveys1999-10-03 → 1999-10-05
    Underwater operations in progress until further notice by M/V goosander and M/V northern admiral within two…
  5. HYDROLANT 2100/99 · Surveys1999-10-03 → 1999-10-03
    Underwater operations in progress until further notice by M/V goosander and M/V northern admiral along…
  6. HYDROLANT 2094/99 · Nav aids1999-10-01 → 1999-10-01
    Copinsay light 58-53.9N 002-40.2W unlit
  7. HYDROLANT 2086/99 · Cable ops1999-09-30 → 1999-10-03
    Cable operations in progress until further notice by M/V northern admiral within two miles of 51-21.3N…
  8. HYDROLANT 2081/99 · Surveys1999-09-29 → 1999-09-29
    Underwater operations in progress until further notice by M/V goosander within four miles of 52-14.2N…
  9. HYDROLANT 2077/99 · Surveys1999-09-29 → 1999-09-29
    Underwater operations in progress until further notice by M/V goosander within one mile of 52-12N 001-40E
  10. HYDROLANT 2074/99 · Surveys1999-09-28 → 1999-09-28
    Underwater operations in progress until further notice by M/V goosander within four miles of 52-14N 002-14E
  11. HYDROLANT 2053/99 · Surveys1999-09-27 → 1999-09-27
    Underwater operations in progress until further notice by M/V goosander along trackline joining 51-21N…
  12. HYDROLANT 2049/99 · Nav aids1999-09-26 → 1999-09-27
    RACON at girdle ness light 57-08N 002-03W inoperative
  13. HYDROLANT 2048/99 · Surveys1999-09-26 → 1999-09-27
    Underwater operations in progress until further notice by M/V goosander along trackline between 51-21N…
  14. HYDROLANT 2033/99 · Nav aids1999-09-23 → 1999-10-12
    Sandettie east buoy 51-15N 002-03E unlit
  15. HYDROLANT 2005/99 · Nav aids1999-09-20 → 1999-09-21
    Fidra light 56-04N 002-47W unreliable
  16. HYDROLANT 1963/99 · Other1999-09-15 → 1999-09-22
    Partially submerged pipes adrift in 60-38N 001-50E at 140900Z sep and 60-56N 002-07E at 141300Z sep
  17. HYDROLANT 1952/99 · Other1999-09-14 → 1999-09-15
    Four 25 meter partially submerged pipes adrift within 20 miles of 60-48N 001-45E
  18. HYDROLANT 1934/99 · Surveys1999-09-12 → 1999-09-15
    Underwater operations in progress until further notice by M/V goosander between 52-22.9N 003-26.4E and…
  19. HYDROLANT 1933/99 · Surveys1999-09-12 → 1999-09-18
    Diving operations in progress until further notice by M/V aquamarine in 53-09.65N 002-44.10E
  20. HYDROLANT 1925/99 · Nav aids1999-09-10 → 1999-09-10
    RACON at cromer light 52-56N 001-19E inoperative 100800Z to 100930Z sep

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