North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
6
since 1997
4,730
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%
Other66814%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,729 cancelled

  1. HYDROLANT 2272/15 · Other2015-09-13 → 2015-10-05
    All navigational aids at platforms inoperative: a. 49/17-CD, 53-25.4N 002-22.5E
  2. HYDROLANT 2262/15 · Cable ops2015-09-12 → 2015-09-14
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  3. HYDROLANT 2242/15 · Nav aids2015-09-10 → 2015-09-13
    All navigational aids at platform 49/9B, 53-49.9N 002-46.3E inoperative
  4. HYDROLANT 2238/15 · Nav aids2015-09-10 → 2015-09-14
    Fog signal at platform tethys 53-39.1N 002-03.5E inoperative
  5. HYDROLANT 2227/15 · Cable ops2015-09-08 → 2015-09-12
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  6. HYDROLANT 2226/15 · Other2015-09-08 → 2017-01-27
    Unexploded ordnance in 52-10.78N 002-37.36E
  7. HYDROLANT 2213/15 · Cable ops2015-09-07 → 2015-09-16
    Seismic survey in progress until further notice by M/V western trident towing eleven 6000 meter long cables…
  8. HYDROLANT 2209/15 · Cable ops2015-09-06 → 2015-09-11
    Seismic survey in progress until further notice by M/V fugro meridian towing 3000 meter long cable in area…
  9. HYDROLANT 2153/15 · Cable ops2015-09-01 → 2015-09-08
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  10. HYDROLANT 2147/15 · Cable ops2015-08-31 → 2015-10-06
    Seismic survey in progress until further notice by M/V ramform challenger towing ten 9000 meter long cables…
  11. HYDROLANT 2133/15 · Other2015-08-30 → 2015-11-08
    Platform under construction in 59-35.3N 001-03.3E
  12. HYDROLANT 2132/15 · Nav aids2015-08-29 → 2015-09-02
    Southwold light 52-19.6N 001-40.9E unreliable
  13. HYDROLANT 2130/15 · Cable ops2015-08-29 → 2015-09-01
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  14. HYDROLANT 2116/15 · Cable ops2015-08-28 → 2015-08-29
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  15. HYDROLANT 2092/15 · Cable ops2015-08-26 → 2015-08-26
    One mile berth requested
  16. HYDROLANT 2086/15 · Nav aids2015-08-25 → 2015-08-28
    All navigational aids at platform 49/30-A, 53-00.3N 002-53.8E inoperative
  17. HYDROLANT 2074/15 · Cable ops2015-08-24 → 2015-08-28
    Seismic survey in progress until further notice by M/V western regent towing 8400 meter long cable vicinity…
  18. HYDROLANT 2072/15 · Surveys2015-08-23 → 2015-08-25
    Underwater operations in progress until further notice by M/V edt protea with submersible in: a. 53-00.9N…
  19. HYDROLANT 2063/15 · Cable ops2015-08-21 → 2015-08-24
    Underwater operations in progress until further notice by cableship pierre de fermat with submersible…
  20. HYDROLANT 2062/15 · Nav aids2015-08-21 → 2015-10-01
    All navigational aids at platform 48/14-PG, 53-31.2N 001-48.0E inoperative

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