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 2558/13 · Cable ops2013-10-16 → 2013-10-19
    Seismic survey in progress until further notice by M/V harrier explorer towing 6000 meter long cable in area…
  2. HYDROLANT 2538/13 · Nav aids2013-10-14 → 2013-11-04
    Cancel this msg 041200Z nov 13
  3. HYDROLANT 2520/13 · Nav aids2013-10-11 → 2013-10-28
    Southern North Sea
  4. HYDROLANT 2509/13 · Nav aids2013-10-11 → 2013-10-11
    England-east Coast
  5. HYDROLANT 2486/13 · Nav aids2013-10-08 → 2013-10-20
    Southern North Sea
  6. HYDROLANT 2483/13 · Cable ops2013-10-08 → 2013-10-18
    Seismic survey in progress until further notice by M/V atlantic explorer towing six 6500 meter long cables…
  7. HYDROLANT 2475/13 · Nav aids2013-10-07 → 2013-10-17
    Southern North Sea
  8. HYDROLANT 2454/13 · Cable ops2013-10-04 → 2013-10-08
    Underwater operations in progress until further notice by cableship raymond croze with submersible within…
  9. HYDROLANT 2408/13 · Cable ops2013-09-29 → 2013-11-03
    Seismic survey in progress until further notice by M/V wg vespucci towing ten four mile long cables in area…
  10. HYDROLANT 2403/13 · Nav aids2013-09-29 → 2013-11-10
    Southern North Sea
  11. HYDROLANT 2397/13 · Other2013-09-27 → 2016-02-28
    Cancel HYDROLANT 2326/13
  12. HYDROLANT 2396/13 · Nav aids2013-09-27 → 2013-10-25
    Southern North Sea
  13. HYDROLANT 2362/13 · Nav aids2013-09-24 → 2013-09-24
    Cancel this msg 241800Z sep 13
  14. HYDROLANT 2360/13 · Nav aids2013-09-24 → 2013-09-27
    Southern North Sea
  15. HYDROLANT 2345/13 · Cable ops2013-09-23 → 2013-10-13
    Seismic survey in progress until further notice by M/V ramform valiant towing 12 five mile long cables in…
  16. HYDROLANT 2339/13 · Cable ops2013-09-21 → 2013-11-10
    Seismic survey in progress until further notice by M/V ramform challenger towing ten 9000 meter long cables…
  17. HYDROLANT 2326/13 · Other2013-09-20 → 2013-09-27
    Wide berth requested
  18. HYDROLANT 2323/13 · Nav aids2013-09-20 → 2013-09-20
    Shetland Islands
  19. HYDROLANT 2313/13 · Nav aids2013-09-18 → 2013-09-19
    Scotland-east Coast
  20. HYDROLANT 2309/13 · Cable ops2013-09-18 → 2013-09-24
    Seismic survey in progress until further notice by M/V fugro searcher in area bound by 53-50N 002-51E,…

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