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 671/99 · Surveys1999-04-06 → 1999-04-12
    Survey operations in progress until further notice by M/V scotian shore towing equipment along trackline…
  2. HYDROLANT 669/99 · Cable ops1999-04-06 → 1999-04-06
    Cable operations in progress until further notice by M/V scotian shore towing equipment along trackline…
  3. HYDROLANT 664/99 · Nav aids1999-04-05 → 1999-04-06
    Stroma island light 58-42N 003-07W unlit
  4. HYDROLANT 632/99 · Nav aids1999-04-01 → 1999-06-02
    Pipelaying operations in progress until further notice by barge semac 1 with support vessels along trackline…
  5. HYDROLANT 614/99 · Nav aids1999-03-30 → 1999-03-30
    Dgps service at north foreland light 51-22N 001-27E unreliable 301200Z to 301700Z mar
  6. HYDROLANT 612/99 · Nav aids1999-03-30 → 1999-03-30
    Dgps service at girdle ness light 57-08N 002-03W unreliable 300900Z to 301600Z mar
  7. HYDROLANT 578/99 · Nav aids1999-03-24 → 1999-03-24
    Dgps service at north foreland light 51-23N 001-27E unereliable 240900Z to 241400Z mar
  8. HYDROLANT 563/99 · Nav aids1999-03-23 → 1999-03-23
    North foreland light 51-23N 001-27E unlit until 231800Z mar
  9. HYDROLANT 548/99 · Cable ops1999-03-20 → 1999-03-22
    Cable operations in progress until further notice by M/V highland fortress with submersible in vicinity…
  10. HYDROLANT 537/99 · Cable ops1999-03-19 → 1999-03-20
    Cable operations in progress until further notice by M/V highland fortress in vicinity 51-35N 002-50E
  11. HYDROLANT 522/99 · Cable ops1999-03-17 → 1999-03-18
    Cable operations in progress until further notice by M/V highland fortress within one mile of 51-07N 001-52E
  12. HYDROLANT 511/99 · Cable ops1999-03-15 → 1999-03-18
    Cable operations in progress until further notice by cableship monarch within one mile of 52-14N 002-12E
  13. HYDROLANT 509/99 · Cable ops1999-03-15 → 1999-03-17
    Cable operations in progress until further notice by M/V highland fortress between 51-17.4N 002-24.2E and…
  14. HYDROLANT 503/99 · Cable ops1999-03-13 → 1999-05-05
    Seismic survey in progress until further notice by M/V american explorer towing six 4000 meter long cables…
  15. HYDROLANT 486/99 · Wrecks1999-03-11 → 1999-06-18
    Foul ground marked by two west cardinal buoys in 52-42.6N 003-15.2E
  16. HYDROLANT 463/99 · Cable ops1999-03-08 → 1999-03-11
    Cable operations in progress until further notice by cableship cable installer in vicinity 51-30.6N 001-54.9E
  17. HYDROLANT 447/99 · Cable ops1999-03-05 → 1999-03-12
    Underwater cable operations in progress until further notice in vicinity 51-29N 001-53E
  18. HYDROLANT 425/99 · Other1999-03-01 → 1999-03-12
    Abandoned fishing gear marked by orange buoy reported in 58-54.2N 001-30.2W
  19. HYDROLANT 414/99 · Nav aids1999-02-28 → 1999-03-01
    South race buoy 53-08N 000-57E unlit
  20. HYDROLANT 411/99 · Nav aids1999-02-27 → 1999-03-02
    Start point light 59-16.7N 002-22.5W unlit

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