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 354/17 · Surveys2017-02-02 → 2017-02-02
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity…
  2. HYDROLANT 338/17 · Nav aids2017-02-01 → 2017-03-15
    Fog signal at platform 9/13-SPM3, 59-32.0N 001-33.5E inoperative
  3. HYDROLANT 329/17 · Nav aids2017-01-31 → 2017-02-03
    Stirling dgps station 56-04N 004-04W off air
  4. HYDROLANT 291/17 · Surveys2017-01-27 → 2017-02-02
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity…
  5. HYDROLANT 265/17 · Surveys2017-01-25 → 2017-01-30
    Underwater operations 26 thru 31 jan by M/V maersk connector with submersible in area bound by 55-37.6N…
  6. HYDROLANT 264/17 · Nav aids2017-01-25 → 2017-01-27
    Stirling dgps station 56-04N 004-04W off air
  7. HYDROLANT 259/17 · Nav aids2017-01-25 → 2017-01-25
    Stirling dgps station 56-04N 004-04W off air 0800Z to 1700Z daily 25 thru 27 jan
  8. HYDROLANT 258/17 · Surveys2017-01-25 → 2017-01-25
    Underwater operations in progress until 30 jan by M/V maersk connector with submersible in area bound by…
  9. HYDROLANT 257/17 · Nav aids2017-01-24 → 2017-01-25
    Skadan light 59-30.8N 001-39.2W unlit
  10. HYDROLANT 246/17 · Nav aids2017-01-24 → 2017-01-24
    Skadan light 59-30.8N 001-39.2W unlit
  11. HYDROLANT 227/17 · Wrecks2017-01-22 → 2017-02-22
    Dangerous wreck marked by lighted buoys in 51-40.21N 002-13.55E
  12. HYDROLANT 213/17 · Nav aids2017-01-20 → 2017-03-03
    Fog signal at wind turbines inoperative in: a. 53-10.4N 001-04.8E
  13. HYDROLANT 211/17 · Nav aids2017-01-20 → 2017-01-30
    Platform 49/16, 53-23.2N 002-08.9E unlit and fog signal inoperative
  14. HYDROLANT 191/17 · Surveys2017-01-19 → 2017-01-24
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity of…
  15. HYDROLANT 171/17 · Other2017-01-17 → 2017-01-18
    Unexploded ordnance, marked by buoy, in 57-41.76N 003-30.17W
  16. HYDROLANT 170/17 · Nav aids2017-01-17 → 2017-02-28
    Scurdie ness light 56-42.1N 002-26.3W range temporarily reduced to 12 miles
  17. HYDROLANT 164/17 · Surveys2017-01-17 → 2017-01-19
    Underwater operations in progress until further notice by M/V havila phoenix with submersible in vicinity of…
  18. HYDROLANT 163/17 · Nav aids2017-01-16 → 2017-02-07
    Platform 48/15B-PXW, 53-34.1N 001-58.3E unlit
  19. HYDROLANT 162/17 · Wrecks2017-01-16 → 2017-01-22
    Dangerous wreck marked by lighted buoys in 51-40.21N 002-13.55E
  20. HYDROLANT 151/17 · Wrecks2017-01-15 → 2017-01-16
    Dangerous wreck marked by lighted buoys in 51-40.20N 002-13.58E

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