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 2774/99 · Nav aids1999-12-20 → 1999-12-22
    Platform 55-54N 001-37E unlit
  2. HYDROLANT 2753/99 · Cable ops1999-12-17 → 1999-12-21
    Underwater operations in progress until further notice by cableship monarch within one mile of 51-33N 001-56E
  3. HYDROLANT 2746/99 · Nav aids1999-12-17 → 2000-01-25
    Ruytingen southeast buoy 51-09N 002-09E unlit
  4. HYDROLANT 2740/99 · Nav aids1999-12-16 → 2000-01-06
    Bergues buoy 51-17N 002-19E unlit
  5. HYDROLANT 2732/99 · Cable ops1999-12-16 → 1999-12-23
    Cable operations in progress until further notice by cableship maersk fighter vicinity of trackline between…
  6. HYDROLANT 2731/99 · Cable ops1999-12-16 → 1999-12-23
    Cable operations in progress until further notice by cableship maersk forwarder vicinity of trackline…
  7. HYDROLANT 2719/99 · Nav aids1999-12-15 → 1999-12-21
    Rce buoy 51-02N 001-53E unlit
  8. HYDROLANT 2686/99 · Cable ops1999-12-11 → 1999-12-16
    Cable operations in progress until further notice by cableship maersk forwarder along trackline joining…
  9. HYDROLANT 2679/99 · Cable ops1999-12-10 → 1999-12-16
    Cable operations in progress until further notice by cableship mearsk fighter vicinity of trackline between…
  10. HYDROLANT 2652/99 · Surveys1999-12-08 → 1999-12-09
    Underwater operations in progress until further notice by M/V polar prince vicinity of trackline between…
  11. HYDROLANT 2646/99 · Nav aids1999-12-07 → 1999-12-08
    Copinsay light 58-54N 002-40W unreliable
  12. HYDROLANT 2645/99 · Containers1999-12-07 → 1999-12-14
    Containers adrift vicinity 59-34N 001-03W at 071502Z dec
  13. HYDROLANT 2643/99 · Nav aids1999-12-07 → 2000-01-06
    Ruytingen west buoy 51-07N 001-51E missing
  14. HYDROLANT 2640/99 · Surveys1999-12-07 → 1999-12-08
    Underwater operations in progress until further notice by M/V polar prince vicinity 51-21N 001-50E
  15. HYDROLANT 2639/99 · Containers1999-12-07 → 1999-12-14
    Six containers adrift vicinity 59-40N 001-10W at 062150Z dec
  16. HYDROLANT 2629/99 · Surveys1999-12-05 → 1999-12-15
    Underwater operations in progress until further notice by M/V granit between 52-03N 002-08E and 52-11N 001-51E
  17. HYDROLANT 2602/99 · Nav aids1999-12-02 → 1999-12-03
    Bergues buoy 51-17N 002-19E unlit
  18. HYDROLANT 2566/99 · Nav aids1999-11-29 → 1999-11-29
    Hoy mouth rear range light 58-56N 003-16W unreliable
  19. HYDROLANT 2546/99 · Surveys1999-11-26 → 1999-11-28
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  20. HYDROLANT 2545/99 · Other1999-11-26 → 2000-01-07
    Unexploded ordnance in 52-28.4N 002-10.5E

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