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 2023/17 · Nav aids2017-06-30 → 2017-07-01
    Dsc station inverbervie 56-51.1N 002-15.7W off air
  2. HYDROLANT 2008/17 · Wrecks2017-06-29 → 2017-07-03
    Submerged obstruction in vicinity 51-18.7N 001-30.4E
  3. HYDROLANT 2007/17 · Cable ops2017-06-29 → 2017-07-01
    Cable operations in progress until further notice by M/V havila subsea in vicinity of trackline joining…
  4. HYDROLANT 2000/17 · Wrecks2017-06-29 → 2017-06-29
    Submerged obstruction in vicinity 51-19N 001-31E
  5. HYDROLANT 1999/17 · Surveys2017-06-29 → 2017-07-14
    Survey operations in progress until further notice by M/V wg magellan towing ten 4630 meter long cables in…
  6. HYDROLANT 1997/17 · Containers2017-06-29 → 2017-07-02
    Container adrift in vicinity 60-48.03N 001-42.55E at 290730Z jun
  7. HYDROLANT 1993/17 · Other2017-06-28 → 2017-07-19
    Unexploded ordnance in area bound by 53-45.0N 001-22.5E, 53-57.1N 001-46.7E, 53-56.7N 002-05.4E, 53-49.3N…
  8. HYDROLANT 1977/17 · Nav aids2017-06-27 → 2017-06-29
    Dgps station at sumburgh head light 59-51.2N 001-16.5W off air 0800Z to 1600Z daily 28 and 29 jun
  9. HYDROLANT 1974/17 · Surveys2017-06-27 → 2017-09-11
    Survey operations in progress until further notice by M/V ramform vanguard towing 12 8100 meter long cables…
  10. HYDROLANT 1972/17 · Nav aids2017-06-27 → 2017-06-27
    Dgps station at sumburgh head light 59-51.3N 001-16.4W off air 0800Z to 1600Z daily 27 and 28 jun
  11. HYDROLANT 1971/17 · Nav aids2017-06-27 → 2017-06-27
    Dgps station at flamborough head light 54-07N 000-05W off air 270800Z to 271600Z jun
  12. HYDROLANT 1967/17 · Other2017-06-26 → 2017-06-28
    Unexploded ordnance in area bound by 53-53.2N 001-38.9E, 53-57.1N 001-46.8E, 53-56.7N 002-05.4E, 53-49.3N…
  13. HYDROLANT 1960/17 · Surveys2017-06-26 → 2017-06-29
    Survey operations in progress until further notice by M/V wg magellan towing ten 9260 meter long cables in…
  14. HYDROLANT 1930/17 · Nav aids2017-06-22 → 2017-06-23
    Dgps station at flamborough head 54-07N 000-05W off air 230730Z to 231200Z jun
  15. HYDROLANT 1924/17 · Nav aids2017-06-22 → 2017-06-26
    All navigational aids at platform 49/21-PRD, 53-14.9N 002-01.5E inoperative
  16. HYDROLANT 1918/17 · Surveys2017-06-21 → 2017-06-27
    Survey operations in progress until further notice by M/V ramform vanguard towing 12 8100 meter long cables…
  17. HYDROLANT 1910/17 · Nav aids2017-06-21 → 2017-06-21
    Cromer light 52-55.5N 001-19.0E unreliable
  18. HYDROLANT 1905/17 · Nav aids2017-06-20 → 2017-07-01
    All navigational aids at platform 49/30-A, 53-00.3N 002-53.8E inoperative
  19. HYDROLANT 1903/17 · Nav aids2017-06-20 → 2017-06-22
    Dgps station at flamborough head 54-07N 000-05W off air 0800Z to 1600Z daily 20 thru 22 jun
  20. HYDROLANT 1893/17 · Wrecks2017-06-18 → 2017-06-21
    Obstruction in 52-09.80N 001-52.17E

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