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 3632/00 · Nav aids2000-10-27 → 2000-10-27
    Dsc station gregness 57-08N 002-03W off air
  2. HYDROLANT 3597/00 · Other2000-10-23 → 2000-10-24
    Hoy sound (high) light 58-56N 003-16W at reduced intensity
  3. HYDROLANT 3589/00 · Nav aids2000-10-22 → 2002-10-11
    Platform F2-HANZE with RACON (d) established in 54-56.72N 004-34.44E
  4. HYDROLANT 3572/00 · Cable ops2000-10-21 → 2000-10-21
    Cable operations in progress until further notice by cableship monarch within 740 meters of 51-14.8N 002-20.5E
  5. HYDROLANT 3569/00 · Cable ops2000-10-21 → 2000-10-25
    Cable operations in progress until further notice by cableship peter farber within one mile of 51-37N 001-57E
  6. HYDROLANT 3555/00 · Cable ops2000-10-20 → 2000-10-21
    Cable operations in progress until further notice by cableship monarch vicinity of trackline between…
  7. HYDROLANT 3552/00 · Cable ops2000-10-19 → 2000-10-24
    Cable operations in progress until further notice by cableship peter faber vicinity of trackline between…
  8. HYDROLANT 3542/00 · Cable ops2000-10-18 → 2000-10-19
    Cable operations in progress until further notice by cableship peter faber vicinity 51-36.5N 001-57.2E
  9. HYDROLANT 3532/00 · Nav aids2000-10-17 → 2000-10-18
    Dgps station at flamborough head light 54-07N 000-05W at reduced power
  10. HYDROLANT 3513/00 · Nav aids2000-10-15 → 2000-10-16
    RACON at tarbat ness light 57-52N 003-47W inoperative
  11. HYDROLANT 3503/00 · Nav aids2000-10-14 → 2000-10-15
    Mpc buoy 51-06N 001-38E missing
  12. HYDROLANT 3501/00 · Nav aids2000-10-14 → 2000-10-22
    Mid new sand west cardinal buoy 53-37N 000-22E off station
  13. HYDROLANT 3492/00 · Other2000-10-13 → 2000-11-08
    Pipelaying operations in progress until further notice by M/V lorilei along trackline joining 53-26.6N…
  14. HYDROLANT 3483/00 · Surveys2000-10-12 → 2000-10-19
    Underwater operations in progress until further notice by M/V nordica vicinity 54-32N 000-10W
  15. HYDROLANT 3473/00 · Nav aids2000-10-12 → 2000-10-12
    Dgps station at flamborough head light 54-07N 000-05W unreliable 120800Z to 121600Z oct
  16. HYDROLANT 3422/00 · Surveys2000-10-06 → 2000-10-06
    Underwater operations in progress until further notice by M/V ace nature with submersible in 52-26.5N…
  17. HYDROLANT 3413/00 · Surveys2000-10-05 → 2000-10-06
    Underwater operations in progress until further notice by M/V ace nature with submersible in 52-27.6N…
  18. HYDROLANT 3394/00 · Nav aids2000-10-03 → 2000-10-04
    Auskerry light 59-02N 002-34W unreliable
  19. HYDROLANT 3393/00 · Other2000-10-03 → 2000-10-05
    Uderwater operations in progress until further notice by M/V ace nature vicinity 52-29N 002-15E
  20. HYDROLANT 3387/00 · Nav aids2000-10-03 → 2000-12-22
    West cardinal buoy 53-14N 002-49E off station

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