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 409/99 · Cable ops1999-02-27 → 1999-03-03
    Cable operations in progress until further notice by cableship peter faber in vicinity 51-16.9N 002-24.6E
  2. HYDROLANT 396/99 · Nav aids1999-02-24 → 1999-02-25
    Start point light 59-17N 002-23W unlit
  3. HYDROLANT 388/99 · Cable ops1999-02-24 → 1999-02-26
    Underwater operations in progress until further notice by cableship peter faber in vicinity 51-04N 001-45E
  4. HYDROLANT 386/99 · Nav aids1999-02-23 → 1999-04-06
    Tyne buoy 54-58.6N 001-19.7W unlit
  5. HYDROLANT 373/99 · Nav aids1999-02-21 → 1999-03-05
    Stroma light 58-42N 003-07W unreliable
  6. HYDROLANT 362/99 · Surveys1999-02-20 → 1999-02-21
    Underwater operations in progress until further notice by M/V highland fortress with submersible in vicinity…
  7. HYDROLANT 359/99 · Nav aids1999-02-19 → 1999-02-20
    Pentland skerries light 58-41N 002-55W unreliable
  8. HYDROLANT 339/99 · Nav aids1999-02-15 → 1999-02-15
    Orfordness light 52-05N 001-35E white light unlit
  9. HYDROLANT 320/99 · Nav aids1999-02-12 → 1999-02-12
    Orfordness light 52-05N 001-35E unlit
  10. HYDROLANT 318/99 · Nav aids1999-02-11 → 1999-02-12
    Lowestoft light 52-29N 001-46E unreliable until 112359Z feb
  11. HYDROLANT 317/99 · Cable ops1999-02-11 → 1999-02-14
    Cable operations in progress until further notice by cableship cable installer in vicinity of 51-30.6N…
  12. HYDROLANT 305/99 · Nav aids1999-02-09 → 1999-02-11
    Dgps service at flamborough head light 54-07N 000-05W unreliable until 102359Z feb
  13. HYDROLANT 303/99 · Nav aids1999-02-09 → 1999-02-10
    Cromer light 52-55N 001-19E unreliable until 101500Z feb
  14. HYDROLANT 290/99 · Nav aids1999-02-08 → 1999-02-09
    Dgps service at flamborough head light 54-07N 000-05W unreliable until 092359Z feb
  15. HYDROLANT 289/99 · Debris1999-02-08 → 1999-02-09
    Large quantity of timber lost overboard in 51-49.0N 002-24.7E at 072130Z feb
  16. HYDROLANT 286/99 · Containers1999-02-07 → 1999-02-09
    40 foot container adrift in vicinity 51-45.2N 002-30.9E at 071524Z feb
  17. HYDROLANT 274/99 · Cable ops1999-02-06 → 1999-02-06
    53 meter section of pipeline equipment protruding 1 meter above the water adrift in vicinity 53-58N 002-49E…
  18. HYDROLANT 268/99 · Nav aids1999-02-05 → 1999-02-06
    Dgps service at north foreland light 51-23N 001-27E off air until 051800Z feb, unreliable 060800Z to 061800Z…
  19. HYDROLANT 265/99 · Nav aids1999-02-05 → 1999-02-05
    Dgps service at girdleness light 57-08N 002-03W unreliable until 051300Z feb
  20. HYDROLANT 241/99 · Cable ops1999-02-02 → 1999-02-05
    Cable operations in progress until further notice by cableship cable installer along trackline between…

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