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 6/13 · Nav aids2013-01-02 → 2013-02-05
    Southern North Sea
  2. HYDROLANT 5/13 · Nav aids2013-01-02 → 2013-02-05
    Cancel HYDROLANT 2960/12
  3. HYDROLANT 3068/12 · Nav aids2012-12-28 → 2013-01-08
    Shetland Islands
  4. HYDROLANT 3038/12 · Nav aids2012-12-27 → 2013-02-05
    Cancel HYDROPAC 2806/12
  5. HYDROLANT 3030/12 · Nav aids2012-12-24 → 2013-02-04
    North Sea
  6. HYDROLANT 3001/12 · Nav aids2012-12-20 → 2013-01-21
    Southern North Sea
  7. HYDROLANT 2975/12 · Nav aids2012-12-17 → 2012-12-18
    Southern North Sea
  8. HYDROLANT 2962/12 · Containers2012-12-15 → 2012-12-18
    Numerous containers adrift vicinity 56-46.1N 001-33.7E at 151600Z dec
  9. HYDROLANT 2961/12 · Derelicts2012-12-15 → 2012-12-16
    Derelict vessel adrift in 58-22.8N 000-44.3E at 151615Z dec
  10. HYDROLANT 2960/12 · Nav aids2012-12-15 → 2013-01-02
    Cancel HYDROLANT 2607/12
  11. HYDROLANT 2955/12 · Nav aids2012-12-15 → 2012-12-15
    Shetland Islands
  12. HYDROLANT 2934/12 · Nav aids2012-12-12 → 2012-12-14
    Southern North Sea
  13. HYDROLANT 2925/12 · Exercises2012-12-11 → 2012-12-14
    Hazardous operations
  14. HYDROLANT 2924/12 · Nav aids2012-12-11 → 2012-12-13
    Cancel HYDROLANT 2921/12
  15. HYDROLANT 2921/12 · Nav aids2012-12-10 → 2012-12-11
    Cancel this msg 121700Z dec 12
  16. HYDROLANT 2918/12 · Nav aids2012-12-10 → 2012-12-28
    North Sea
  17. HYDROLANT 2913/12 · Nav aids2012-12-09 → 2013-01-03
    Southern North Sea
  18. HYDROLANT 2908/12 · Nav aids2012-12-09 → 2015-11-08
    Sunk east safe water buoy, iso 2.5 sec, RACON (t) established in 51-53.2N 002-07.5E
  19. HYDROLANT 2890/12 · Wrecks2012-12-07 → 2013-02-16
    Cancel HYDROLANT 2885/12
  20. HYDROLANT 2885/12 · Wrecks2012-12-06 → 2012-12-07
    Southern North Sea

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