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 738/10 · Nav aids2010-04-27 → 2010-04-29
    Mrcc humber mf dsc service 55-31N 001-37W unreliable
  2. HYDROLANT 713/10 · Cable ops2010-04-24 → 2010-04-25
    Underwater operations in progress until further notice by cableship peter faber vicinity 51-21.4N 001-33.6E
  3. HYDROLANT 709/10 · Nav aids2010-04-23 → 2010-05-07
    Nga chart 37058 (2ND ed)
  4. HYDROLANT 704/10 · Other2010-04-23 → 2010-04-23
    Nga chart 37140 (33RD ed)
  5. HYDROLANT 697/10 · Cable ops2010-04-21 → 2010-04-24
    Underwater operations in progress until further notice by cableship peter faber in 51-23.3N 002-26.8E
  6. HYDROLANT 682/10 · Nav aids2010-04-20 → 2010-04-20
    Nga chart 37053 (1ST ed)
  7. HYDROLANT 681/10 · Nav aids2010-04-19 → 2010-05-29
    Nga chart 37057 (2ND ed)
  8. HYDROLANT 679/10 · Other2010-04-19 → 2010-10-23
    Nga chart 37165 (3RD ed)
  9. HYDROLANT 619/10 · Other2010-04-09 → 2010-04-15
    Nga chart 35004 (1ST ed)
  10. HYDROLANT 618/10 · Wrecks2010-04-09 → 2010-05-20
    Nga chart 37028 (0 ed)
  11. HYDROLANT 580/10 · Nav aids2010-04-03 → 2010-04-20
    Nga chart 37121 (11TH ed)
  12. HYDROLANT 551/10 · Nav aids2010-03-30 → 2010-04-01
    Nga chart 35000 (26TH ed)
  13. HYDROLANT 510/10 · Nav aids2010-03-24 → 2010-03-24
    Nga chart 35010 (1ST ed)
  14. HYDROLANT 498/10 · Nav aids2010-03-23 → 2010-03-23
    Mrcc shetland 60-09N 001-08W services off air
  15. HYDROLANT 492/10 · Exercises2010-03-22 → 2010-03-24
    Hazardous operations
  16. HYDROLANT 471/10 · Nav aids2010-03-18 → 2011-02-19
    Nga chart 35055 (1ST ed)
  17. HYDROLANT 468/10 · Nav aids2010-03-18 → 2010-03-19
    Nga chart 35001 (1ST ed)
  18. HYDROLANT 455/10 · Nav aids2010-03-16 → 2010-04-23
    Nga chart 37058 (2ND ed)
  19. HYDROLANT 446/10 · Nav aids2010-03-14 → 2010-03-17
    Nga chart 35001 (1ST ed)
  20. HYDROLANT 426/10 · Nav aids2010-03-12 → 2010-04-24
    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.