North Sea

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

in force
3
last 12 months
3
since 1997
4,727
categories
11

In force now · 3

  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.
  2. HYDROLANT 1488/26 · Nav aids2026-08-01
    Medium frequency DSC and radiotelephone services are off air at Bawdsey, Cullercoats, and Gregness site. Hydrolant 1441/26 is cancelled.
  3. HYDROLANT 1477/26 · Surveys2026-07-31
    Survey operations are in progress in the North Sea off Norway, with vessel Amazon Conqueror towing eight 1609-meter cables; two-mile berth requested.

Longest in force

  1. HYDROLANT 1477/26 · Surveys2026-07-31
    Survey operations are in progress in the North Sea off Norway, with vessel Amazon Conqueror towing eight 1609-meter cables; two-mile berth requested.
  2. HYDROLANT 1488/26 · Nav aids2026-08-01
    Medium frequency DSC and radiotelephone services are off air at Bawdsey, Cullercoats, and Gregness site. Hydrolant 1441/26 is cancelled.
  3. 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 aids2,50053%
Other66814%
Cable ops65814%
Surveys58212%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,724 cancelled

  1. HYDROLANT 2668/17 · Nav aids2017-08-31 → 2017-09-04
    Cgoc humber mf r/t and dsc services at cullercoats 55-01N 001-25W unreliable
  2. HYDROLANT 2651/17 · Surveys2017-08-30 → 2017-09-01
    Survey operations in progress until further notice by M/V deep helder along trackline between 51-18.4N…
  3. HYDROLANT 2646/17 · Nav aids2017-08-30 → 2017-10-12
    Fog signal at platform 9/13-SPM3, 59-32.0N 001-33.5E inoperative
  4. HYDROLANT 2637/17 · Nav aids2017-08-29 → 2017-10-11
    All navigational aids at platform 49/30A, 53-00.3N 002-53.8E inoperative
  5. HYDROLANT 2613/17 · Nav aids2017-08-26 → 2017-09-07
    Fog signal at platform 42/30-A, 54-01.8N 000-58.0E unreliable
  6. HYDROLANT 2587/17 · Nav aids2017-08-25 → 2017-08-25
    Kinnairds head light 57-41.9N 002-00.2W unreliable
  7. HYDROLANT 2563/17 · Surveys2017-08-23 → 2017-08-26
    Underwater operations in progress until further notice by M/V rambiz 300 in vicinity 53-05.0N 002-32.7E
  8. HYDROLANT 2554/17 · Nav aids2017-08-22 → 2017-08-23
    RACON at scurdie ness light 56-42.1N 002-26.3W inoperative
  9. HYDROLANT 2551/17 · Nav aids2017-08-22 → 2017-08-23
    Auskerry light 59-01.5N 002-34.3W unreliable
  10. HYDROLANT 2549/17 · Other2017-08-21 → 2017-09-12
    Multiple submerged and floating pipes anchored in area bound by 52-47.1N 001-37.8E, 52-47.6N 001-38.8E,…
  11. HYDROLANT 2543/17 · Surveys2017-08-20 → 2017-08-25
    Underwater operations in progress until further notice by M/V noordhoek pathfinder in vicinity of trackline…
  12. HYDROLANT 2539/17 · Other2017-08-19 → 2017-09-30
    Unexploded ordnance in 51-19.31N 001-56.12E
  13. HYDROLANT 2532/17 · Wrecks2017-08-18 → 2017-09-29
    Fog signals at sheringham shoal wind farm 53-08N 001-10E unreliable
  14. HYDROLANT 2497/17 · Nav aids2017-08-15 → 2017-08-17
    Dgps station at girdle ness light 57-08.3N 002-02.9W off air 0800Z to 1600Z daily 15 thru 17 aug
  15. HYDROLANT 2490/17 · Nav aids2017-08-14 → 2017-08-14
    Auskerry light 59-01.5N 002-34.3W unreliable
  16. HYDROLANT 2483/17 · Nav aids2017-08-13 → 2017-08-13
    Auskerry light 59-01.5N 002-34.3W unreliable
  17. HYDROLANT 2479/17 · Surveys2017-08-12 → 2017-08-15
    Underwater operations in progress until further notice by M/V rambiz 3000 in vicinity 53-05.0N 002-32.7E
  18. HYDROLANT 2478/17 · Nav aids2017-08-12 → 2017-08-25
    All navigational aids at platform 44/23 a-cm, 54-12.2N 002-27.1E inoperative
  19. HYDROLANT 2471/17 · Cable ops2017-08-11 → 2017-08-16
    Underwater operations in progress until further notice by cableship pierre de fermat with submersible in…
  20. HYDROLANT 2463/17 · Nav aids2017-08-11 → 2017-08-11
    Auskerry light 59-01.5N 002-34.3W unreliable

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