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 2410/99 · Cable ops1999-11-10 → 1999-11-15
    Cable operations in progress until further notice by M/V granit along trackline between 51-21N 001-39E and…
  2. HYDROLANT 2409/99 · Nav aids1999-11-10 → 1999-11-22
    Sandettie east buoy 51-15N 002-03E missing
  3. HYDROLANT 2393/99 · Cable ops1999-11-09 → 1999-11-18
    Cable operations in progress until further notice by M/V toisa puma vicinity 52-28N 002-11E
  4. HYDROLANT 2382/99 · Surveys1999-11-07 → 1999-11-13
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  5. HYDROLANT 2377/99 · Nav aids1999-11-07 → 1999-11-07
    Start point light 59-17N 002-23W unlit
  6. HYDROLANT 2356/99 · Surveys1999-11-04 → 1999-11-06
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  7. HYDROLANT 2347/99 · Nav aids1999-11-04 → 1999-11-04
    Copinsay light 58-54N 002-40W unlit
  8. HYDROLANT 2336/99 · Cable ops1999-11-03 → 1999-11-04
    Cable operations in progress until further notice by cableship monarch within one mile of 51-36.1N 001-57.3E
  9. HYDROLANT 2328/99 · Nav aids1999-11-02 → 1999-11-02
    Dgps station at girdle ness light 57-08N 002-03W inoperative
  10. HYDROLANT 2327/99 · Cable ops1999-11-02 → 1999-12-15
    Seismic survey in progress until further notice by M/V american explorer towing six 3500 meter long cables…
  11. HYDROLANT 2319/99 · Surveys1999-10-30 → 1999-11-02
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline between…
  12. HYDROLANT 2316/99 · Nav aids1999-10-30 → 2000-02-21
    Buoy established in 51-04.4N 001-53.1E
  13. HYDROLANT 2315/99 · Surveys1999-10-30 → 1999-11-03
    Salvage operations in progress until further notice in 57-48.80N 003-17.35W
  14. HYDROLANT 2314/99 · Nav aids1999-10-30 → 1999-11-12
    Bell rock light 56-26N 002-23W unreliable
  15. HYDROLANT 2313/99 · Cable ops1999-10-30 → 1999-10-31
    Cable operations in progress until further notice by cableship monarch within one mile of 51-36.1N 001-57.3E
  16. HYDROLANT 2300/99 · Cable ops1999-10-28 → 1999-11-12
    Cable operations in progress until further notice by cableship brodopas moon vicinity of trackline between…
  17. HYDROLANT 2292/99 · Surveys1999-10-27 → 1999-10-30
    Underwater operations in progress until further notice by M/V northern admiral vicinity of trackline joining…
  18. HYDROLANT 2291/99 · Cable ops1999-10-27 → 1999-10-28
    Cable operations in progress until further notice by cableship brodospas moon between 52-17.6N 002-19.9E and…
  19. HYDROLANT 2290/99 · Cable ops1999-10-27 → 1999-11-25
    Cable operations in progress until further notice by M/V sea surveyor between 54-36.3N 001-02.1W and…
  20. HYDROLANT 2289/99 · Nav aids1999-10-27 → 1999-10-27
    Dgps station at girdle ness light 57-08N 002-03W unreliable 270900Z to 271600Z oct

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