North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
6
since 1997
4,731
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 aids2,50253%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,730 cancelled

  1. HYDROLANT 1813/06 · Nav aids2006-10-04 → 2006-10-04
    Kinnairds head light 57-41.9N 002-00.1W unreliable
  2. HYDROLANT 1803/06 · Other2006-10-04 → 2006-10-04
    Kinnairds head light 57-41.9N 002-00.1W at reduced intensity
  3. HYDROLANT 1776/06 · Wrecks2006-09-29 → 2006-10-25
    7.1 meter shoal in 59-06.85N 002-50.29W
  4. HYDROLANT 1715/06 · Cable ops2006-09-20 → 2006-09-26
    Underwater operations in progress until further notice by cableship wave sentinel in area bound by 51-09.0N…
  5. HYDROLANT 1709/06 · Cable ops2006-09-19 → 2006-09-20
    Underwater operations in progress until further notice by cableship wave sentinel along trackline joining…
  6. HYDROLANT 1688/06 · Wrecks2006-09-14 → 2008-02-09
    Shoals reported between 11 and four meters within 275 meters of 59-06.9N 002-50.3W
  7. HYDROLANT 1663/06 · Nav aids2006-09-12 → 2006-09-12
    Stirling dgps station 56-04.3N 004-03.6W off air 120930Z to 121330Z sep
  8. HYDROLANT 1658/06 · Nav aids2006-09-11 → 2006-09-11
    Stirling dgps station 56-04.3N 004-03.6W inoperative until 111430Z sep
  9. HYDROLANT 1644/06 · Wrecks2006-09-09 → 2008-02-09
    Underwater obstruction in 59-09.4N 002-49.5W
  10. HYDROLANT 1643/06 · Cable ops2006-09-09 → 2006-09-14
    Underwater operations in progress until further notice by cableship wave sentinel along trackline between…
  11. HYDROLANT 1608/06 · Nav aids2006-09-02 → 2006-09-08
    Dgps station at sumburgh head light 59-51.3N 001-16.5W off air
  12. HYDROLANT 1600/06 · Other2006-09-01 → 2006-09-15
    Pipelaying operations in progress until further notice by M/V apache along trackline joining 53-43.1N…
  13. HYDROLANT 1577/06 · Surveys2006-08-29 → 2006-09-12
    Underwater operations in progress until further notice by M/V sea explorer vicinity 53-26N 002-55E
  14. HYDROLANT 1564/06 · Surveys2006-08-26 → 2006-08-28
    Underwater operations in progress until further notice by M/V sea explorer vicinity 53-26N 002-55E
  15. HYDROLANT 1554/06 · Nav aids2006-08-25 → 2006-08-26
    Dgps station at gridle ness light 57-08.3N 002-02.8W inoperative 250900Z to 251530Z and 261000Z to 261200Z aug
  16. HYDROLANT 1543/06 · Nav aids2006-08-24 → 2006-08-24
    Dgps station at sumburgh head light 59-51.3N 001-16.5W off air
  17. HYDROLANT 1538/06 · Other2006-08-23 → 2006-08-31
    Pipelaying operations in progress until further notice by M/V apache along trackline between 57-22N 001-27E…
  18. HYDROLANT 1530/06 · Nav aids2006-08-22 → 2006-08-23
    Dgps station at sumburgh head light 59-51.3N 001-16.5W off air 0800Z to 1530Z daily 22 and 23 aug
  19. HYDROLANT 1529/06 · Other2006-08-21 → 2008-02-09
    Platform established in 53-56.4N 002-44.8E
  20. HYDROLANT 1481/06 · Other2006-08-13 → 2006-08-21
    Pipelaying operations in progress until further notice by M/V apache along trackline between 57-08.1N…

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