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 · 4,724 cancelled

  1. HYDROLANT 2118/17 · Nav aids2017-07-08 → 2017-07-09
    Head of mula light 60-40.8N 000-57.6W unlit
  2. HYDROLANT 2113/17 · Nav aids2017-07-07 → 2017-08-03
    All navigational aids at platform mariner a, 59-35.3N 001-03.3E inoperative
  3. HYDROLANT 2111/17 · Wrecks2017-07-07 → 2017-08-06
    Dangerous wreck marked by buoys in 52-25.23N 001-49.67E
  4. HYDROLANT 2110/17 · Nav aids2017-07-07 → 2017-08-18
    Fog signal at wind turbines inoperative in: a. 53-10.4N 001-04.8E
  5. HYDROLANT 2109/17 · Wrecks2017-07-07 → 2017-08-05
    Dangerous wreck marked by lighted buoys in 51-40.20N 002-13.58E
  6. HYDROLANT 2102/17 · Surveys2017-07-07 → 2017-07-18
    Survey operations in progress until further notice by M/V wg amundsen towing 12 7000 meter long cables in…
  7. HYDROLANT 2098/17 · Wrecks2017-07-06 → 2017-07-07
    Dangerous wreck marked by buoys in 52-25.23N 001-49.67E
  8. HYDROLANT 2086/17 · Wrecks2017-07-06 → 2017-07-06
    Dangerous wreck in 52-23.64N 001-48.96E
  9. HYDROLANT 2081/17 · Nav aids2017-07-05 → 2018-09-07
    St
  10. HYDROLANT 2062/17 · Nav aids2017-07-04 → 2017-07-06
    Dgps station at north foreland light 51-22.5N 001-26.7E off air 0800Z to 1600Z daily 04 thru 06 jul
  11. HYDROLANT 2049/17 · Surveys2017-07-02 → 2017-07-06
    Underwater operations in progress until further notice by M/V rambiz 300 in 53-05.0N 002-32.7E
  12. HYDROLANT 2044/17 · Containers2017-07-02 → 2017-07-05
    Container adrift in 60-39.7N 001-47.1E at 020745Z jul
  13. HYDROLANT 2043/17 · Surveys2017-07-02 → 2017-07-07
    Survey operations in progress until further notice by M/V wg amundsen in area bound by 59-00N 001-31E,…
  14. HYDROLANT 2042/17 · Cable ops2017-07-01 → 2017-07-19
    Cable operations in progress until further notice by M/V havila subsea in vicinity of trackline joining…
  15. HYDROLANT 2040/17 · Containers2017-07-01 → 2017-07-04
    Container adrift in 60-37.2N 001-40.3E at 011812Z jul
  16. HYDROLANT 2023/17 · Nav aids2017-06-30 → 2017-07-01
    Dsc station inverbervie 56-51.1N 002-15.7W off air
  17. HYDROLANT 2008/17 · Wrecks2017-06-29 → 2017-07-03
    Submerged obstruction in vicinity 51-18.7N 001-30.4E
  18. 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…
  19. HYDROLANT 2000/17 · Wrecks2017-06-29 → 2017-06-29
    Submerged obstruction in vicinity 51-19N 001-31E
  20. 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…

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