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 1987/04 · Wrecks2004-12-13 → 2006-09-20
    Dangerous wreck, least depth 21.3 meters, in 51-17.8N 001-53.8E
  2. HYDROLANT 1950/04 · Nav aids2004-12-07 → 2004-12-07
    Dgps station at flamborough head lighthouse 54-07N 000-05W unreliable 070900Z to 071700Z dec
  3. HYDROLANT 1942/04 · Wrecks2004-12-06 → 2004-12-12
    East and west cardinal light buoys marking wreck 52-33.5N 002-32.6E removed
  4. HYDROLANT 1935/04 · Wrecks2004-12-03 → 2004-12-10
    Dangerous wreck, least depth 21.3 meters, in 51-17.8N 001-53.8E
  5. HYDROLANT 1932/04 · Other2004-12-03 → 2005-01-26
    Pipelaying operations in progress until further notice by M/V skandi navica along trackline between 53-40.9N…
  6. HYDROLANT 1854/04 · Nav aids2004-11-16 → 2004-11-16
    Kinnairds head light 57-41.9N 002-00.1W unreliable
  7. HYDROLANT 1853/04 · Nav aids2004-11-16 → 2006-06-01
    RACON at east cardinal light buoy 52-33N 002-33E discontinued
  8. HYDROLANT 1851/04 · Surveys2004-11-15 → 2004-11-24
    Survey operations in progress until 260001Z nov by M/V fs laperous within four miles of 51-12.5N 002-04.5E
  9. HYDROLANT 1843/04 · Nav aids2004-11-14 → 2004-11-15
    Graemsay island rear range light 58-56.2N 003-16.3W unlit
  10. HYDROLANT 1781/04 · Nav aids2004-11-03 → 2004-12-08
    Sandettie north buoy 51-18N 002-05E missing
  11. HYDROLANT 1779/04 · Nav aids2004-11-03 → 2004-11-03
    Sandettie east buoy 51-15N 002-03E unlit
  12. HYDROLANT 1759/04 · Other2004-11-01 → 2004-11-09
    Pipelaying operations in progress until further notice by M/V orelia within two miles of 56-23N 002-17E
  13. HYDROLANT 1740/04 · Nav aids2004-10-28 → 2004-11-03
    Sandettie north buoy 51-18N 002-05E off station
  14. HYDROLANT 1724/04 · Nav aids2004-10-25 → 2004-10-26
    North galloper buoy 51-50N 002-00E unlit
  15. HYDROLANT 1714/04 · Wrecks2004-10-22 → 2006-06-01
    9.2 meter depth reported in 51-03.29N 001-53.04E
  16. HYDROLANT 1673/04 · Wrecks2004-10-15 → 2005-01-05
    9.2 meter shoal in 51-03.3N 001-53.0E
  17. HYDROLANT 1651/04 · Wrecks2004-10-11 → 2005-01-05
    3.5 meter shoal in 52-41.77N 001-46.04E
  18. HYDROLANT 1624/04 · Cable ops2004-10-04 → 2004-12-18
    Cable operations in progress until further notice by cableship discovery vicinity of trackline joining…
  19. HYDROLANT 1614/04 · Other2004-10-02 → 2004-10-09
    Two 3000 meter long survey cables adrift vicinity 60-36N 001-45E at 020245Z oct
  20. HYDROLANT 1557/04 · Containers2004-09-23 → 2004-09-30
    Two containers adrift in 51-52N 002-25E at 231915Z sep

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