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 1466/05 · Other2005-08-12 → 2005-08-16
    Fishing nets marked with four blue barrels adrift in 57-14N 001-54W
  2. HYDROLANT 1459/05 · Other2005-08-11 → 2006-09-20
    Unexploded ordnance vicinity 53-05.14N 000-42.07E
  3. HYDROLANT 1454/05 · Other2005-08-10 → 2005-08-11
    Bombing exercises 111000Z to 111030Z aug within four miles of trackline between 54-03N 000-10E and 54-10N…
  4. HYDROLANT 1451/05 · Wrecks2005-08-10 → 2006-06-01
    Dangerous wreck, depth 21.4 meters, marked by west cardinal buoy, RACON (d) in 53-03.830N 002-42.065E
  5. HYDROLANT 1447/05 · Wrecks2005-08-09 → 2005-08-10
    Dangerous wreck, depth 21.4 meters, marked by RACON (d) in 53-03.8N 002-42.7E
  6. HYDROLANT 1445/05 · Other2005-08-09 → 2005-10-11
    Unexploded ordnance vicinity 52-45.7N 002-02.7E
  7. HYDROLANT 1442/05 · Other2005-08-09 → 2005-08-17
    Pipelaying operations in progress until further notice by barge lorelay vicinity of trackline joining…
  8. HYDROLANT 1435/05 · Surveys2005-08-08 → 2006-02-01
    Survey operations in progress until further notice by M/V anglian soveveing in area bound by 59-05N 002-33W,…
  9. HYDROLANT 1411/05 · Other2005-08-04 → 2005-08-22
    Pipelaying operations in progress until further notice by M/V nordica and M/V polar queen along trackline…
  10. HYDROLANT 1387/05 · Cable ops2005-07-30 → 2005-08-04
    Seismic survey in progress until further notice by M/V fugro meridian towing 1200 meter long cable within…
  11. HYDROLANT 1378/05 · Other2005-07-29 → 2006-01-24
    Unexploded ordnance in: a. 52-50.2N 002-22.4E
  12. HYDROLANT 1373/05 · Other2005-07-28 → 2005-08-24
    Pipelaying operations in progress until further notice by M/V solitaire along trackline between 60-31.4N…
  13. HYDROLANT 1354/05 · Nav aids2005-07-26 → 2005-07-26
    Dgps station at sumburgh light 59-51.3N 001-16.3W off air 261000Z to 261500Z jul
  14. HYDROLANT 1350/05 · Surveys2005-07-25 → 2005-07-28
    Survey operations in progress until further notice by M/V ramsey vicinity a. 51-03N 001-23E b. 51-15N…
  15. HYDROLANT 1331/05 · Nav aids2005-07-22 → 2005-07-23
    East cardinal buoy 51-33.9N 001-25.0E unlit
  16. HYDROLANT 1321/05 · Surveys2005-07-20 → 2005-07-22
    Survey operations in progress until further notice by M/V ramsey along trackline joining 51-03N 001-23E,…
  17. HYDROLANT 1279/05 · Nav aids2005-07-12 → 2005-07-14
    Dgps station at north foreland light 51-22.5N 001-26.8E unreliable 0800Z to 1500Z daily 12 thru 14 jul
  18. HYDROLANT 1278/05 · Nav aids2005-07-12 → 2005-07-28
    Coquet island light 55-20.0N 001-32.2W unreliable
  19. HYDROLANT 1277/05 · Other2005-07-12 → 2006-01-24
    Unexploded ordnance: a. 52-35.45N 002-57.29E
  20. HYDROLANT 1269/05 · Cable ops2005-07-10 → 2005-07-14
    Seismic survey in progress until further notice by M/V sea explorer towing 600 meter long cable within 1.5…

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