North Sea

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

in force
1
last 12 months
7
since 1997
4,732
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 aids2,50353%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,731 cancelled

  1. HYDROLANT 202/04 · Nav aids2004-02-03 → 2004-02-06
    Aberdeen fairway buoy 57-09N 002-02W unlit
  2. HYDROLANT 158/04 · Other2004-01-27 → 2004-02-16
    Rce buoy 51-03N 001-53E unreliable
  3. HYDROLANT 144/04 · Other2004-01-24 → 2004-01-25
    Copinsay light 58-53.9N 002-40.1W at reduced intensity
  4. HYDROLANT 143/04 · Nav aids2004-01-24 → 2004-02-27
    East goodwin lightfloat 51-13N 001-36E range temporarily reduced to 15 miles
  5. HYDROLANT 117/04 · Nav aids2004-01-21 → 2004-01-24
    Bell rock light 56-26N 002-23W unlit
  6. HYDROLANT 116/04 · Nav aids2004-01-21 → 2004-01-23
    Copinsay light 58-53.8N 002-40.2W unlit
  7. HYDROLANT 105/04 · Debris2004-01-19 → 2004-01-26
    Fishing net marked by red buoy adrift in 51-05.4N 001-46.3E
  8. HYDROLANT 92/04 · Nav aids2004-01-17 → 2004-01-24
    East goodwin lightfloat 51-13N 001-36E temporarily replaced by lightfloat, fl w 15 sec 15 miles, horn 30…
  9. HYDROLANT 73/04 · Cable ops2004-01-14 → 2004-01-17
    Cable laying operations in progress until further notice by barge pontra maris within one mile of 52-37.0N…
  10. HYDROLANT 64/04 · Nav aids2004-01-13 → 2004-01-17
    Fidra light 56-04.4N 002-47.1W unreliable
  11. HYDROLANT 43/04 · Cable ops2004-01-09 → 2004-01-11
    Cable laying operations in progress until further notice by barge pontra maris within one mile of 52-37.0N…
  12. HYDROLANT 28/04 · Cable ops2004-01-06 → 2004-01-08
    Cable laying operations in progress until further notice by barge pontra maris within one mile of 52-37.0N…
  13. HYDROLANT 7/04 · Nav aids2004-01-02 → 2004-01-23
    Sandettie north buoy 51-18.4N 002-04.8E unlit
  14. HYDROLANT 6/04 · Cable ops2004-01-02 → 2004-01-18
    Seismic survey in progress until further notice by M/V geo searcher towing 3000 meter long cable in area…
  15. HYDROLANT 2422/03 · Nav aids2003-12-31 → 2004-01-23
    Fairy bank buoy 51-21.2N 002-17.3E unlit
  16. HYDROLANT 2398/03 · Cable ops2003-12-27 → 2003-12-30
    Seismic survey in progress until further notice by M/V geo searcher towing 3000 meter long cable: a. in area…
  17. HYDROLANT 2380/03 · Wrecks2003-12-23 → 2004-02-07
    Dangerous wreck, swept depth 27 meters, marked by east cardinal buoy, RACON (d) and west cardinal buoy in…
  18. HYDROLANT 2375/03 · Nav aids2003-12-22 → 2003-12-23
    Mrsc humber mf dsc 54-18N 000-05W inoperative
  19. HYDROLANT 2374/03 · Wrecks2003-12-22 → 2004-06-16
    Dangerous wreck, least depth 17.5 meters, in 57-45.4N 003-09.9W
  20. HYDROLANT 2362/03 · Nav aids2003-12-20 → 2003-12-20
    Stirling dgps station 56-04N 004-04W at reduced power

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