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 1534/07 · Other2007-09-05 → 2008-02-09
    Nga chart 37165 (3RD ed)
  2. HYDROLANT 1524/07 · Nav aids2007-09-03 → 2007-09-05
    GPS jamming exercises 0800Z to 1800Z daily 04 and 05 sep within eight miles of 53-28.5N 000-09.2E
  3. HYDROLANT 1516/07 · Nav aids2007-09-02 → 2007-09-02
    Nga chart 37056 (0 ed)
  4. HYDROLANT 1499/07 · Nav aids2007-08-29 → 2007-08-31
    GPS jamming exercises 0800Z to 1800Z daily 30 and 31 aug within eight miles of 53-28.5N 000-09.2W
  5. HYDROLANT 1493/07 · Other2007-08-29 → 2007-08-31
    Pipelaying operations in progress until further notice by M/V skandi inspector vicinity trackline between…
  6. HYDROLANT 1488/07 · Surveys2007-08-27 → 2007-08-29
    Underwater operations in progress until further notice in vicinity of 58-17.6N 000-26.0E
  7. HYDROLANT 1470/07 · Wrecks2007-08-24 → 2008-02-09
    Nga chart 35052 (0 ed)
  8. HYDROLANT 1458/07 · Nav aids2007-08-23 → 2007-08-23
    Mrcc station forth 55-55.0N 002-08.3W off air
  9. HYDROLANT 1420/07 · Other2007-08-14 → 2007-08-25
    Pipelaying operations in progress until further notice by M/V acercy falcon along trackline between 53-00.3N…
  10. HYDROLANT 1417/07 · Cable ops2007-08-14 → 2007-09-13
    Seismic survey 15 aug until 12 sep by M/V geco topaz towing eight 3500 meter long cables in area bound by…
  11. HYDROLANT 1415/07 · Other2007-08-14 → 2008-02-09
    Well established 58-21.84N 000-03.67E
  12. HYDROLANT 1408/07 · Other2007-08-13 → 2007-09-03
    Diver operation in progress until further notice vicinity 53-06.03N 002-28.50E
  13. HYDROLANT 1403/07 · Nav aids2007-08-11 → 2008-02-09
    Nga chart 37140 (33RD ed)
  14. HYDROLANT 1387/07 · Nav aids2007-08-08 → 2007-08-08
    Dsc station saxa vord 60-50N 000-50W unavailable until further notice
  15. HYDROLANT 1370/07 · Wrecks2007-08-06 → 2008-02-09
    Nga chart 37057 (1ST ed)
  16. HYDROLANT 1362/07 · Other2007-08-04 → 2007-12-02
    Nga chart 37057 (1ST ed)
  17. HYDROLANT 1324/07 · Nav aids2007-07-28 → 2008-02-09
    Nga chart 37244 (11TH ed)
  18. HYDROLANT 1323/07 · Surveys2007-07-28 → 2007-08-25
    Survey operations in progress by M/V sea surveyor vicinity 53-25.75N 002-53.85E
  19. HYDROLANT 1283/07 · Nav aids2007-07-21 → 2007-07-22
    Nga chart 37244 (11TH ed)
  20. HYDROLANT 1274/07 · Other2007-07-20 → 2008-02-09
    Nga chart 37057 (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.