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 1801/10 · Nav aids2010-09-24 → 2010-09-24
    Nga chart 35013 (0 ed)
  2. HYDROLANT 1768/10 · Surveys2010-09-18 → 2010-09-29
    Survey operations in progress until further notice by M/V icebeam towing equipment along trackline joining…
  3. HYDROLANT 1740/10 · Nav aids2010-09-15 → 2010-09-15
    Nga chart 35172 (3RD ed)
  4. HYDROLANT 1728/10 · Nav aids2010-09-13 → 2010-09-14
    Nga chart 35172 (3RD ed)
  5. HYDROLANT 1724/10 · Nav aids2010-09-12 → 2011-01-29
    Nga chart 35014 (3RD ed)
  6. HYDROLANT 1723/10 · Nav aids2010-09-12 → 2010-09-12
    Nga chart 35172 (3RD ed)
  7. HYDROLANT 1722/10 · Nav aids2010-09-12 → 2010-09-12
    Nga chart 35014 (3RD ed)
  8. HYDROLANT 1713/10 · Nav aids2010-09-11 → 2010-09-11
    Nga chart 35172 (3RD ed)
  9. HYDROLANT 1709/10 · Nav aids2010-09-10 → 2010-09-12
    Nga chart 35014 (3RD ed)
  10. HYDROLANT 1685/10 · Surveys2010-09-07 → 2010-09-13
    Underwater operations in progress until further notice by M/V icebeam along trackline between 51-19.5N…
  11. HYDROLANT 1684/10 · Nav aids2010-09-07 → 2010-09-10
    Nga chart 35172 (3RD ed)
  12. HYDROLANT 1682/10 · Nav aids2010-09-07 → 2010-09-07
    Nga chart 37166 (3RD ed)
  13. HYDROLANT 1677/10 · Nav aids2010-09-05 → 2010-10-12
    Nga chart 37129 (6TH ed)
  14. HYDROLANT 1673/10 · Surveys2010-09-04 → 2010-09-06
    Underwater operations in progress until further notice by M/V icebeam in: a. 51-19.6N 002-20.8E
  15. HYDROLANT 1668/10 · Other2010-09-04 → 2010-10-23
    Nga chart 37165 (3RD ed)
  16. HYDROLANT 1642/10 · Wrecks2010-08-31 → 2010-12-11
    Nga chart 37166 (3RD ed)
  17. HYDROLANT 1629/10 · Other2010-08-30 → 2010-09-02
    150 meter long mooring rope adrift in 56-59.7N 000-35.4W at 290645Z aug
  18. HYDROLANT 1619/10 · Nav aids2010-08-27 → 2010-09-01
    Nga chart 37057 (2ND ed)
  19. HYDROLANT 1618/10 · Cable ops2010-08-27 → 2010-09-16
    Seismic survey in progress until 152359Z sep by M/V ramform viking towing 16 4800 meter long cables in area…
  20. HYDROLANT 1608/10 · Nav aids2010-08-26 → 2010-08-26
    Nga chart 35057(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.