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 1861/11 · Cable ops2011-11-08 → 2011-11-19
    Cable laying operations in progress until further notice by cableship asv pioneer vicinity 52-01.2N 001-50.2E
  2. HYDROLANT 1855/11 · Nav aids2011-11-08 → 2011-11-08
    Nga chart 37166 (2ND ed)
  3. HYDROLANT 1846/11 · Nav aids2011-11-07 → 2011-11-07
    Nga chart 35172 (2ND ed)
  4. HYDROLANT 1822/11 · Nav aids2011-11-03 → 2011-11-05
    Nga chart 35172 (2ND ed)
  5. HYDROLANT 1802/11 · Nav aids2011-11-01 → 2011-11-01
    Nga chart 35172 (2ND ed)
  6. HYDROLANT 1778/11 · Other2011-10-28 → 2011-10-28
    Nga chart 43015 (12TH ed)
  7. HYDROLANT 1764/11 · Nav aids2011-10-26 → 2011-10-26
    Nga chart 35063 (1ST ed)
  8. HYDROLANT 1763/11 · Nav aids2011-10-26 → 2011-10-26
    Sumburgh head light 59-51.3N 001-16.3W unlit
  9. HYDROLANT 1762/11 · Nav aids2011-10-25 → 2011-10-26
    Nga chart 35001 (1ST ed)
  10. HYDROLANT 1757/11 · Nav aids2011-10-25 → 2011-12-06
    Mrcc shetland 60-09N 001-08W mf r/t off air
  11. HYDROLANT 1753/11 · Other2011-10-24 → 2012-05-26
    Nga chart 37140 (34TH ed)
  12. HYDROLANT 1747/11 · Nav aids2011-10-24 → 2011-10-27
    Nga chart 35172 (2ND ed)
  13. HYDROLANT 1743/11 · Nav aids2011-10-22 → 2011-10-23
    Nga chart 35172 (2ND ed)
  14. HYDROLANT 1734/11 · Nav aids2011-10-21 → 2011-11-22
    Mrcc aberdeen mf r/t service at gregness 57-08N 002-03W unreliable
  15. HYDROLANT 1717/11 · Nav aids2011-10-19 → 2011-10-19
    Mrcc aberdeen mf r/t service at gregness 57-08N 002-03W unreliable
  16. HYDROLANT 1714/11 · Surveys2011-10-18 → 2011-10-22
    Salvage operations in progress until further notice vicinity 51-14.97N 001-28.19E
  17. HYDROLANT 1711/11 · Cable ops2011-10-18 → 2011-10-20
    Seismic survey in progress until further notice by M/V geo caspian towing ten 9000 meter long cables in area…
  18. HYDROLANT 1709/11 · Cable ops2011-10-17 → 2011-10-18
    Seismic survey in progress until further notice by M/V geo caspian towing ten 9000 meter long cables in area…
  19. HYDROLANT 1695/11 · Nav aids2011-10-15 → 2011-10-16
    Nga chart 35013 (0 ed)
  20. HYDROLANT 1680/11 · Nav aids2011-10-14 → 2011-10-14
    Mrcc aberdeen mf r/t service at gregness 57-08N 002-03W off air

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