North Sea

IHO sea area 4 · -4° to 12° E, 51° to 61° N

in force
1
last 12 months
7
since 1997
4,732
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 aids2,50353%
Other66914%
Cable ops65814%
Surveys58312%
Wrecks1704%
Containers441%
Derelicts341%
Exercises321%
Debris291%
Mines90%
Missiles10%

Archive · 4,731 cancelled

  1. HYDROLANT 1557/04 · Containers2004-09-23 → 2004-09-30
    Two containers adrift in 51-52N 002-25E at 231915Z sep
  2. HYDROLANT 1548/04 · Nav aids2004-09-22 → 2004-09-30
    Ruytingen west lightbuoy 51-07N 001-50E missing
  3. HYDROLANT 1544/04 · Surveys2004-09-21 → 2004-10-13
    Survey operations in progress until further notice by M/V bangor and M/V grimsby with submersibles along…
  4. HYDROLANT 1543/04 · Nav aids2004-09-21 → 2004-09-22
    Ruytingen sw lightbuoy 51-05N 001-47E missing
  5. HYDROLANT 1505/04 · Nav aids2004-09-16 → 2004-10-28
    Sandettie north buoy 51-18N 002-05E off station
  6. HYDROLANT 1463/04 · Nav aids2004-09-08 → 2004-09-09
    South falls buoy 51-14N 001-44E unlit
  7. HYDROLANT 1450/04 · Surveys2004-09-04 → 2004-10-20
    Underwater operations in progress until further notice in areas: a. bound by 51-28.1N 001-03.2E, 51-28.4N…
  8. HYDROLANT 1437/04 · Surveys2004-09-02 → 2004-09-27
    Underwater operations in progress until further notice vicinity of trackline between 51-48N 001-58E and…
  9. HYDROLANT 1420/04 · Nav aids2004-08-29 → 2004-09-01
    Ruytingen west buoy 51-07N 001-50E unlit
  10. HYDROLANT 1412/04 · Nav aids2004-08-26 → 2004-08-29
    Ruytingen west buoy 51-07N 001-50E unlit
  11. HYDROLANT 1366/04 · Nav aids2004-08-18 → 2004-09-08
    Platform 49/26-E 53-03.2N 002-11.3E unlit
  12. HYDROLANT 1322/04 · Nav aids2004-08-10 → 2004-08-10
    Dgps station at girdle ness light 57-08N 002-02W off air 100800Z to 101400Z aug
  13. HYDROLANT 1311/04 · Debris2004-08-06 → 2004-08-13
    Fishing gear adrift in 56-45.0N 000-39.7E
  14. HYDROLANT 1286/04 · Other2004-08-03 → 2004-11-17
    Pipelaying operations in progress until further notice by barge lorlay vicinity of trackline a. between…
  15. HYDROLANT 1278/04 · Surveys2004-08-01 → 2004-08-06
    Underwater operations in progress until further notice by M/V ernest shackleton within 2 miles of 55-28N…
  16. HYDROLANT 1272/04 · Cable ops2004-07-31 → 2004-08-19
    Seismic survey in progress until further notice by M/V ramform valiant towing ten 4500 meter long cables in…
  17. HYDROLANT 1251/04 · Cable ops2004-07-27 → 2004-09-08
    Pipeline operations in progress until further notice by M/V seaway falcon along trackline joining 52-54.7N…
  18. HYDROLANT 1231/04 · Other2004-07-22 → 2004-08-25
    Navigation prohibited until further notice within two miles of 55-28.0N 001-25.0W
  19. HYDROLANT 1219/04 · Surveys2004-07-20 → 2004-11-01
    Hydrographic survey in progress until further notice by M/V elinor th towing equipment in area bound by…
  20. HYDROLANT 1147/04 · Cable ops2004-07-07 → 2004-07-16
    Seismic survey in progress until further notice by M/V sea profiler towing one 600 meter long cable within…

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