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 757/13 · Nav aids2013-03-25 → 2013-03-27
    Southern North Sea
  2. HYDROLANT 715/13 · Nav aids2013-03-20 → 2013-03-23
    Orkney Islands
  3. HYDROLANT 702/13 · Nav aids2013-03-20 → 2013-05-01
    Southern North Sea
  4. HYDROLANT 701/13 · Other2013-03-20 → 2013-04-26
    B. 49/17-DD 53-26.4N 002-23.6E
  5. HYDROLANT 699/13 · Cable ops2013-03-19 → 2013-06-03
    Seismic survey in progress until further notice by M/V oceanic phoenix towing ten 6000 meter long cables in…
  6. HYDROLANT 683/13 · Surveys2013-03-18 → 2013-03-28
    Underwater operations in progress until further notice in 55-38.4N 001-36.7W
  7. HYDROLANT 677/13 · Nav aids2013-03-18 → 2013-04-29
    Cancel HYDROLANT 307/13
  8. HYDROLANT 659/13 · Nav aids2013-03-16 → 2013-03-17
    Southern North Sea
  9. HYDROLANT 650/13 · Nav aids2013-03-14 → 2013-03-17
    Southern North Sea
  10. HYDROLANT 630/13 · Nav aids2013-03-13 → 2013-05-04
    Scotland-east Coast
  11. HYDROLANT 624/13 · Nav aids2013-03-12 → 2013-03-13
    Shetland Islands
  12. HYDROLANT 618/13 · Wrecks2013-03-11 → 2015-06-06
    B. 18.5 meters in 53-43.14N 000-19.95E
  13. HYDROLANT 588/13 · Nav aids2013-03-08 → 2013-03-08
    Shetland Islands
  14. HYDROLANT 565/13 · Nav aids2013-03-04 → 2014-11-15
    Cancel HYDROLANT 563/13
  15. HYDROLANT 563/13 · Other2013-03-04 → 2013-03-04
    Southern North Sea
  16. HYDROLANT 553/13 · Nav aids2013-03-02 → 2013-04-13
    Cancel HYDROLANT 519/13
  17. HYDROLANT 552/13 · Nav aids2013-03-02 → 2013-03-02
    Southern North Sea
  18. HYDROLANT 527/13 · Nav aids2013-02-27 → 2013-03-06
    Scotland
  19. HYDROLANT 522/13 · Nav aids2013-02-26 → 2013-04-09
    Cancel HYDROLANT 128/13
  20. HYDROLANT 519/13 · Nav aids2013-02-25 → 2013-03-02
    Cancel HYDROLANT 512/13, light restored

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