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 2390/12 · Nav aids2012-10-12 → 2012-10-19
    Southern North Sea
  2. HYDROLANT 2384/12 · Nav aids2012-10-11 → 2012-10-22
    Dover Strait
  3. HYDROLANT 2380/12 · Nav aids2012-10-11 → 2012-10-12
    Cullercoats 55-04N 001-28W transmitter off air
  4. HYDROLANT 2372/12 · Other2012-10-10 → 2012-11-12
    Cancel HYDROLANT 1986/12
  5. HYDROLANT 2356/12 · Cable ops2012-10-08 → 2012-10-12
    Underwater operations in progress until further notice by cableship rene descartes with submersible vicinity…
  6. HYDROLANT 2355/12 · Debris2012-10-08 → 2012-10-11
    Numerous ten meter long objects adrift within five miles of 51-55.0N 001-58.7E
  7. HYDROLANT 2348/12 · Wrecks2012-10-07 → 2012-10-29
    Expect depths less than charted in vicinity
  8. HYDROLANT 2341/12 · Nav aids2012-10-06 → 2012-10-07
    Scotland-southeast Coast
  9. HYDROLANT 2336/12 · Cable ops2012-10-06 → 2012-10-24
    Seismic survey in progress until further notice by M/V nordic explorer towing five mile long cable in area…
  10. HYDROLANT 2287/12 · Nav aids2012-10-01 → 2012-10-01
    Southern North Sea
  11. HYDROLANT 2278/12 · Cable ops2012-09-29 → 2012-10-23
    Seismic survey in progress until further notice by M/V oceanic challenger towing equipment 250 meters long…
  12. HYDROLANT 2269/12 · Nav aids2012-09-28 → 2012-11-24
    Mrsc forth 56-17N 002-35W off air
  13. HYDROLANT 2231/12 · Nav aids2012-09-24 → 2012-09-25
    England-east Coast
  14. HYDROLANT 2223/12 · Cable ops2012-09-24 → 2012-09-29
    Underwater operations in progress until further notice by cableship rene descartes vicinity of trackline…
  15. HYDROLANT 2209/12 · Nav aids2012-09-23 → 2012-11-04
    Cancel HYDROLANT 1983/12
  16. HYDROLANT 2136/12 · Nav aids2012-09-15 → 2012-09-15
    England-east Coast
  17. HYDROLANT 2126/12 · Nav aids2012-09-14 → 2012-09-22
    England-southeast Coast
  18. HYDROLANT 2118/12 · Other2012-09-12 → 2015-04-02
    Shetland Islands
  19. HYDROLANT 2116/12 · Other2012-09-12 → 2012-09-14
    Bombing exercises 1030Z to 1230Z daily 12 thru 14 sep in area bound by 55-31N 001-11W, 55-38N 000-38W,…
  20. HYDROLANT 2109/12 · Cable ops2012-09-11 → 2012-09-14
    Seismic survey in progress until further notice by M/V western pride towing eight 2.5 mile long cables in…

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