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 1678/11 · Nav aids2011-10-13 → 2011-10-17
    Nga chart 37166 (2ND ed)
  2. HYDROLANT 1662/11 · Cable ops2011-10-09 → 2011-10-10
    Seismic survey in progress until further notice by M/V geo caspian towing ten 8800 meter long cables in area…
  3. HYDROLANT 1628/11 · Nav aids2011-10-05 → 2011-10-11
    Mrcc aberdeen 57-08N 002-03W mf r/t and dsc service off air
  4. HYDROLANT 1617/11 · Wrecks2011-10-03 → 2013-02-16
    Nga chart 35008 (21ST ed)
  5. HYDROLANT 1588/11 · Other2011-09-29 → 2011-10-28
    Nga chart 43015 (12TH ed)
  6. HYDROLANT 1561/11 · Cable ops2011-09-25 → 2011-10-13
    Seismic survey in progress until 12 oct by M/V ramform viking towing 12 6700 meter long cables in area bound…
  7. HYDROLANT 1559/11 · Nav aids2011-09-25 → 2011-10-25
    Mrcc shetland 60-09N 001-08W mf r/t and dsc service off air
  8. HYDROLANT 1557/11 · Cable ops2011-09-24 → 2011-09-26
    Cable laying operations in progress until further notice by cableship pioneer vicinity 52-01.2N 001-50.2E
  9. HYDROLANT 1554/11 · Nav aids2011-09-24 → 2011-09-25
    Mrcc shetland mf r/t and dsc services off air: a. shetland 60-09N 001-08W
  10. HYDROLANT 1533/11 · Cable ops2011-09-21 → 2011-09-25
    Seismic survey in progress until 12 oct by M/V ramform viking towing 12 6700 meter long cables in area bound…
  11. HYDROLANT 1528/11 · Nav aids2011-09-21 → 2011-09-25
    Nga chart 37166 (2ND ed)
  12. HYDROLANT 1516/11 · Nav aids2011-09-19 → 2011-09-23
    Nga chart 37166 (2ND ed)
  13. HYDROLANT 1514/11 · Cable ops2011-09-19 → 2011-09-24
    Seismic survey in progress until 23 sep by M/V geo caspian towing ten 8800 meter long cables in area bound…
  14. HYDROLANT 1479/11 · Cable ops2011-09-15 → 2011-09-21
    Seismic survey in progress until 052259Z oct by M/V ramform viking towing 12 6700 meter long cables in area…
  15. HYDROLANT 1469/11 · Nav aids2011-09-13 → 2011-09-14
    Nga chart 35066 (1ST ed)
  16. HYDROLANT 1463/11 · Nav aids2011-09-13 → 2011-09-15
    Nga chart 37028 (27TH ed)
  17. HYDROLANT 1447/11 · Nav aids2011-09-10 → 2011-09-23
    Nga chart 37057 (2ND ed)
  18. HYDROLANT 1424/11 · Nav aids2011-09-07 → 2011-09-09
    Nga chart 37059 (0 ed)
  19. HYDROLANT 1415/11 · Nav aids2011-09-06 → 2011-09-08
    Nga chart 35010 (1ST ed)
  20. HYDROLANT 1407/11 · Nav aids2011-09-04 → 2011-09-05
    Nga chart 35063 (1ST ed)

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