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 1696/13 · Other2013-07-15 → 2013-11-18
    Cancel HYDROLANT 1365/13
  2. HYDROLANT 1691/13 · Cable ops2013-07-13 → 2013-07-18
    Underwater operations in progress until further notice by cableship raymond croze vicinity of trackline…
  3. HYDROLANT 1679/13 · Cable ops2013-07-12 → 2013-07-31
    Seismic survey in progress until further notice by M/V ramform valiant towing 12 four mile long cables in…
  4. HYDROLANT 1675/13 · Cable ops2013-07-12 → 2013-07-17
    Seismic survey in progress until 17 aug by M/V western regent towing 12 two mile long cables in area bound…
  5. HYDROLANT 1658/13 · Cable ops2013-07-10 → 2013-07-16
    Seismic survey in progress until further notice by M/V artemis arctic towing eight 5000 meter long cables in…
  6. HYDROLANT 1637/13 · Other2013-07-07 → 2015-07-06
    England-east Coast
  7. HYDROLANT 1636/13 · Nav aids2013-07-07 → 2013-11-10
    Cancel HYDROLANT 945/13
  8. HYDROLANT 1628/13 · Other2013-07-06 → 2013-08-12
    Cancel HYDROLANT 1291/13
  9. HYDROLANT 1588/13 · Nav aids2013-07-02 → 2013-07-02
    Orkney Islands
  10. HYDROLANT 1585/13 · Nav aids2013-06-30 → 2013-08-03
    B. 49/17-HD 53-29.8N 002-19.4E
  11. HYDROLANT 1583/13 · Nav aids2013-06-30 → 2015-04-02
    England-southeast Coast
  12. HYDROLANT 1541/13 · Other2013-06-24 → 2013-08-24
    Southern North Sea
  13. HYDROLANT 1518/13 · Cable ops2013-06-21 → 2013-07-15
    Seismic survey in progress until further notice by M/V polar duke towing 12 2900 meter long cables in area…
  14. HYDROLANT 1505/13 · Cable ops2013-06-19 → 2013-07-28
    Seismic survey in progress until further notice by M/V ocean endeavour towing 12 8000 meter long cables in…
  15. HYDROLANT 1496/13 · Nav aids2013-06-18 → 2013-07-16
    England-east Coast
  16. HYDROLANT 1490/13 · Nav aids2013-06-17 → 2013-07-29
    Scotland
  17. HYDROLANT 1438/13 · Nav aids2013-06-11 → 2013-06-12
    England-east Coast
  18. HYDROLANT 1391/13 · Nav aids2013-06-05 → 2013-06-12
    Cancel this msg 121800Z jun 13
  19. HYDROLANT 1366/13 · Nav aids2013-06-03 → 2013-06-30
    B. 49/17-HD 53-29.8N 002-19.4E
  20. HYDROLANT 1365/13 · Other2013-06-03 → 2013-07-15
    Cancel HYDROLANT 274/13

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