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 1595/10 · Surveys2010-08-24 → 2010-08-28
    Underwater operations in progress until further notice by M/V ocean discovery within 4.5 miles of 56-16N…
  2. HYDROLANT 1593/10 · Wrecks2010-08-23 → 2010-08-30
    Nga chart 37166 (3RD ed)
  3. HYDROLANT 1591/10 · Nav aids2010-08-23 → 2010-10-04
    Nga chart 37059 (0 ed)
  4. HYDROLANT 1582/10 · Nav aids2010-08-21 → 2010-08-21
    Nga chart 35172 (3RD ed)
  5. HYDROLANT 1573/10 · Nav aids2010-08-20 → 2010-08-21
    Mrcc forth rt service 55-54N 002-12W inoperative
  6. HYDROLANT 1550/10 · Cable ops2010-08-17 → 2010-08-30
    Underwater operations in progress until further notice by cableship sovereign along trackline between…
  7. HYDROLANT 1546/10 · Cable ops2010-08-16 → 2010-08-27
    Seismic survey in progress until 31 aug by M/V ramform viking and M/V ocean explorer towing 16 4800 meter…
  8. HYDROLANT 1526/10 · Surveys2010-08-11 → 2010-08-16
    Underwater operations in progress until further notice by M/V ocean discovery within 4.5 miles of 56-16N…
  9. HYDROLANT 1520/10 · Nav aids2010-08-10 → 2010-09-25
    Nga chart 37057 (2ND ed)
  10. HYDROLANT 1512/10 · Surveys2010-08-08 → 2010-09-04
    Survey operations in progress until further notice by M/V icebeam towing 300 meter long cable along…
  11. HYDROLANT 1510/10 · Nav aids2010-08-08 → 2010-08-08
    Nga chart 35172 (3RD ed)
  12. HYDROLANT 1474/10 · Nav aids2010-08-02 → 2010-08-14
    Nga chart 37058 (2ND ed)
  13. HYDROLANT 1473/10 · Surveys2010-08-02 → 2010-11-27
    Survey operations in progress until further notice by M/V fugro discovery in areas bound by: a. 56-51.07N…
  14. HYDROLANT 1438/10 · Cable ops2010-07-27 → 2010-10-27
    Seismic survey in progress until further notice by M/V wg tasman towing ten 6000 meter long cables in area…
  15. HYDROLANT 1437/10 · Cable ops2010-07-27 → 2010-09-06
    Seismic survey in progress until further notice by M/V northern genesis towing five mile long cable in area…
  16. HYDROLANT 1421/10 · Cable ops2010-07-25 → 2010-08-22
    Seismic survey in progress until further notice by M/V cgg amadeus towing eight 4500 meter long cables in…
  17. HYDROLANT 1395/10 · Surveys2010-07-21 → 2010-07-25
    Underwater operations in progress until further notice by M/V l espoir within 4.5 miles of 56-16N 002-15W
  18. HYDROLANT 1375/10 · Cable ops2010-07-19 → 2010-08-16
    Seismic survey in progress until further notice by M/V ramform viking towing 16 4800 meter long cables in…
  19. HYDROLANT 1348/10 · Nav aids2010-07-15 → 2010-07-16
    Nga chart 37059 (0 ed)
  20. HYDROLANT 1332/10 · Surveys2010-07-14 → 2010-07-21
    Survey operations in progress until further notice by M/V fugro discovery towing equipment vicinity 53-02.1N…

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