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 650/09 · Cable ops2009-04-04 → 2009-04-18
    Seismic survey in progress until further notice by M/V ramform viking towing ten 6000 meter long cables…
  2. HYDROLANT 649/09 · Surveys2009-04-04 → 2009-04-05
    Salvage operations in progress until further notice within 1000 meters of 57-40.5N 001-24.5W
  3. HYDROLANT 640/09 · Other2009-04-02 → 2009-05-23
    Nga chart 37165 (3RD ed)
  4. HYDROLANT 632/09 · Other2009-04-01 → 2009-05-23
    Nga chart 37125 (15TH ed)
  5. HYDROLANT 631/09 · Nav aids2009-04-01 → 2009-04-27
    Nga chart 37125 (15TH ed)
  6. HYDROLANT 583/09 · Nav aids2009-03-25 → 2009-04-01
    Nga chart 37125 (15TH ed)
  7. HYDROLANT 573/09 · Nav aids2009-03-23 → 2009-03-25
    Nga chart 37125 (15TH ed)
  8. HYDROLANT 556/09 · Nav aids2009-03-20 → 2009-03-23
    Nga chart 37125 (15TH ed)
  9. HYDROLANT 535/09 · Nav aids2009-03-17 → 2009-03-17
    Nga chart 35010 (1ST ed)
  10. HYDROLANT 498/09 · Nav aids2009-03-12 → 2010-05-01
    Nga chart 37040 (1ST ed)
  11. HYDROLANT 383/09 · Nav aids2009-02-24 → 2009-08-10
    Nga chart 35055 (1ST ed)
  12. HYDROLANT 366/09 · Other2009-02-22 → 2009-02-22
    Nga chart 35063 (1ST ed)
  13. HYDROLANT 356/09 · Other2009-02-21 → 2009-02-21
    Nga chart 35063 (1ST ed)
  14. HYDROLANT 348/09 · Nav aids2009-02-20 → 2009-03-20
    Nga chart 37125 (15TH ed)
  15. HYDROLANT 343/09 · Nav aids2009-02-18 → 2009-02-20
    Nga chart 37125 (15TH ed)
  16. HYDROLANT 304/09 · Nav aids2009-02-12 → 2009-02-13
    Mrcc aberdeen 57-09N 002-05W mf dsc inoperative
  17. HYDROLANT 284/09 · Nav aids2009-02-10 → 2009-02-10
    Nga chart 37120 (3RD ed)
  18. HYDROLANT 254/09 · Nav aids2009-02-06 → 2009-02-07
    Nga chart 37028 (0 ed)
  19. HYDROLANT 221/09 · Nav aids2009-02-02 → 2009-02-18
    Nga chart 35069 (1ST ed)
  20. HYDROLANT 181/09 · Nav aids2009-01-26 → 2009-04-16
    Nga chart 37057 (2ND 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.