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 1677/08 · Other2008-10-09 → 2008-10-10
    Nga chart 35068 (1ST ed)
  2. HYDROLANT 1655/08 · Other2008-10-07 → 2008-10-08
    Nga chart 35068 (1ST ed)
  3. HYDROLANT 1647/08 · Nav aids2008-10-06 → 2008-11-01
    Nga chart 37057 (0 ed)
  4. HYDROLANT 1632/08 · Other2008-10-03 → 2008-10-29
    Nga chart 37055 (0 ed)
  5. HYDROLANT 1594/08 · Surveys2008-09-28 → 2008-11-09
    Survey operations in progress until further notice by M/V cefas endeavour in area bound by 52-50N 001-40E,…
  6. HYDROLANT 1591/08 · Other2008-09-28 → 2008-09-29
    Nga chart 35059 (1ST ed)
  7. HYDROLANT 1576/08 · Other2008-09-26 → 2008-10-03
    Nga chart 37055 (0 ed)
  8. HYDROLANT 1539/08 · Cable ops2008-09-21 → 2008-09-24
    Underwater operations in progress until further notice by cableship leon thevenin with submersible vicinity…
  9. HYDROLANT 1530/08 · Nav aids2008-09-19 → 2008-09-22
    Nga chart 35067 (1ST ed)
  10. HYDROLANT 1523/08 · Other2008-09-19 → 2008-10-31
    Nga chart 37166 (2ND ed)
  11. HYDROLANT 1518/08 · Nav aids2008-09-18 → 2008-09-19
    Nga chart 35061 (2ND ed)
  12. HYDROLANT 1513/08 · Nav aids2008-09-17 → 2008-09-19
    Nga chart 35067 (1ST ed)
  13. HYDROLANT 1508/08 · Nav aids2008-09-17 → 2008-09-19
    Nga chart 37059 (0 ed)
  14. HYDROLANT 1440/08 · Nav aids2008-09-06 → 2008-09-07
    Nga chart 37140 (33RD ed)
  15. HYDROLANT 1439/08 · Nav aids2008-09-06 → 2008-09-16
    Nga chart 35013 (0 ed)
  16. HYDROLANT 1425/08 · Cable ops2008-09-04 → 2008-09-29
    Seismic survey in progress until further notice by M/V northern genesis towing 4.5 mile long cable in area…
  17. HYDROLANT 1417/08 · Nav aids2008-09-04 → 2008-09-18
    Nga chart 37058 (2ND ed)
  18. HYDROLANT 1416/08 · Surveys2008-09-03 → 2008-10-08
    Survey operations in progress until further notice by M/V geco eagle towing six 5000 meter long cables in…
  19. HYDROLANT 1413/08 · Cable ops2008-09-03 → 2008-10-06
    Seismic survey in progress until further notice by M/V alize towing eight 6000 meter long cables in area…
  20. HYDROLANT 1388/08 · Surveys2008-08-29 → 2008-10-08
    Underwater operations in progress until further notice in vicinity of trackline between 53-21.1N 001-18.2E…

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