Survey operations in the North Sea
Hydrographic and scientific survey vessels, often towing long arrays.
- in force
- 1
- last 12 months
- 3
- vs previous 12 (0)
- —
- since 1997
- 583
Coverage note: the NGA archive ends 2024-05 and live collection began 2026-08-17. Warnings issued in between are here only if they were still in force when collection started, so 2024–2026 are under-counted.
In force now · 1
Longest in force
By month (all years)
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F
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A
M
J
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Other hazards in the North Sea
Archive · 582 cancelled
- HYDROLANT 1762/182018-06-04 → 2018-07-21Survey operations in progress until 31 jul by M/V wg amundsen towing ten 3000 meter long cables in area…North Sea
- HYDROLANT 1747/182018-06-03 → 2018-06-17Survey operations in progress until further notice by M/V atlantic guardian in area within eight miles of…North Sea
- HYDROLANT 1575/182018-05-19 → 2018-06-08Survey operations in progress by M/V polar duchess towing ten 7000 meter long cables in area bound by 57-55N…North Sea · Scotland
- HYDROLANT 1380/182018-05-02 → 2018-07-29Survey operations in progress until 01 aug by M/V wg cook, M/V wg tasman, M/V geco emerald and M/V mainport…North Sea
- HYDROLANT 1314/182018-04-25 → 2018-06-06Underwater operations in progress until further notice by M/V havila phoenix in vicinity of trackline…North Sea · France
- HYDROLANT 1225/182018-04-17 → 2018-04-23Underwater operations in progress until further notice by M/V edda freya in vicinity of trackline joining…North Sea · England
- HYDROLANT 864/182018-03-11 → 2018-03-16Underwater operations in progress until further notice by M/V normand reach in 53-05.0N 002-32.7ENorth Sea · England
- HYDROLANT 590/182018-02-18 → 2018-02-20Survey operations in progress until further notice by M/V geosurveyor XI in vicinity 51-20N 001-55ENorth Sea · England
- HYDROLANT 4114/172017-12-19 → 2017-12-20Underwater operations in progress until further notice by M/V deep helder in vicinity 51-19.6N 001-54.7ENorth Sea
- HYDROLANT 4047/172017-12-14 → 2017-12-18Underwater operations in progress until further notice by M/V deep helder in vicinity of 51-19.6N 001-54.7ENorth Sea · Dover Strait · England
- HYDROLANT 3985/172017-12-09 → 2017-12-11Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…North Sea · Dover Strait · England
- HYDROLANT 3888/172017-12-01 → 2017-12-06Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…North Sea · Dover Strait · England
- HYDROLANT 3816/172017-11-25 → 2017-11-30Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…North Sea · Dover Strait · England
- HYDROLANT 3775/172017-11-23 → 2017-11-25Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…North Sea · Dover Strait · England
- HYDROLANT 3724/172017-11-18 → 2017-11-22Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…North Sea · Dover Strait · England
- HYDROLANT 3624/172017-11-09 → 2017-11-17Underwater operations in progress until further notice by M/V havila phoenix in vicinity of trackline…North Sea · Dover Strait · England
- HYDROLANT 3266/172017-10-13 → 2017-10-20Underwater operations in progress until further notice by M/V rambiz 3000 in 53-05.0N 002-32.7ENorth Sea · England
- HYDROLANT 3253/172017-10-11 → 2017-11-18Salvage operations in progress until further notice in 51-40.20N 002-13.58ENorth Sea · England
- HYDROLANT 3078/172017-09-28 → 2017-11-09Underwater operations in progress until further notice by M/V havila phoenix in vicinity of trackline…North Sea · Dover Strait · England
- HYDROLANT 3075/172017-09-27 → 2017-10-26Survey operations in progress until further notice by M/V sanco swift towing 12 9000 meter long cables in…North Sea · Norway
- HYDROLANT 3073/172017-09-27 → 2017-09-28Underwater operations in progress until further notice by M/V havila phoenix in vicinity 51-19.2N 001-33.1ENorth Sea · England
- HYDROLANT 3070/172017-09-27 → 2017-09-30Underwater operations in progress until further notice by M/V rambiz 300 in 53-05.0N 002-32.7ENorth Sea · England
- HYDROLANT 3014/172017-09-24 → 2017-09-27Underwater operations in progress until further notice by M/V havila phoenix along trackline joining…North Sea · Dover Strait · England · France
- HYDROLANT 3003/172017-09-24 → 2017-10-30Survey operations in progress until further notice by M/V ramform vanguard towing 12 6000 meter long cables…North Sea
- HYDROLANT 2887/172017-09-17 → 2017-09-19Survey operations in progress until further notice by M/V deep helder in vicinity of trackline between…North Sea · Dover Strait · England
- HYDROLANT 2781/172017-09-09 → 2017-09-20Survey operations in progress until further notice by M/V wg amudsen towing eight 5000 meter long cables in…North Sea
- HYDROLANT 2720/172017-09-05 → 2017-09-10Underwater operations in progress until further notice by M/V rambiz 3000 in 53-05.0N 002-32.7ENorth Sea · England
- HYDROLANT 2651/172017-08-30 → 2017-09-01Survey operations in progress until further notice by M/V deep helder along trackline between 51-18.4N…North Sea · Dover Strait · England
- HYDROLANT 2563/172017-08-23 → 2017-08-26Underwater operations in progress until further notice by M/V rambiz 300 in vicinity 53-05.0N 002-32.7ENorth Sea · England-east Coast
- HYDROLANT 2543/172017-08-20 → 2017-08-25Underwater operations in progress until further notice by M/V noordhoek pathfinder in vicinity of trackline…North Sea · Dover Strait · England-east Coast
- HYDROLANT 2479/172017-08-12 → 2017-08-15Underwater operations in progress until further notice by M/V rambiz 3000 in vicinity 53-05.0N 002-32.7ENorth Sea · England-east Coast
- HYDROLANT 2453/172017-08-09 → 2017-08-14Survey operations in progress until further notice by M/V geosurveyor XI in vicinity of trackline between…North Sea
- HYDROLANT 2421/172017-08-05 → 2017-08-07Underwater operations in progress until further notice by M/V rambiz 3000 in vicinity of 53-05.0N 002-32.7ENorth Sea · England-east Coast
- HYDROLANT 2368/172017-07-31 → 2017-08-02Underwater operations in progress until further notice by M/V rambiz 3000 in vicinity 53-05.0N 002-32.7ENorth Sea
- HYDROLANT 2239/172017-07-19 → 2017-07-26Underwater operations in progress until further notice by M/V rambiz 3000 in 53-05.0N 002-32.7ENorth Sea
- HYDROLANT 2102/172017-07-07 → 2017-07-18Survey operations in progress until further notice by M/V wg amundsen towing 12 7000 meter long cables in…North Sea · Norway
- HYDROLANT 2049/172017-07-02 → 2017-07-06Underwater operations in progress until further notice by M/V rambiz 300 in 53-05.0N 002-32.7ENorth Sea
- HYDROLANT 2043/172017-07-02 → 2017-07-07Survey operations in progress until further notice by M/V wg amundsen in area bound by 59-00N 001-31E,…North Sea · Norway
- HYDROLANT 1999/172017-06-29 → 2017-07-14Survey operations in progress until further notice by M/V wg magellan towing ten 4630 meter long cables in…North Sea · Scotland-east Coast
- HYDROLANT 1974/172017-06-27 → 2017-09-11Survey operations in progress until further notice by M/V ramform vanguard towing 12 8100 meter long cables…North Sea
- HYDROLANT 1960/172017-06-26 → 2017-06-29Survey operations in progress until further notice by M/V wg magellan towing ten 9260 meter long cables in…North Sea · Scotland-east Coast
- HYDROLANT 1918/172017-06-21 → 2017-06-27Survey operations in progress until further notice by M/V ramform vanguard towing 12 8100 meter long cables…North Sea
- HYDROLANT 1845/172017-06-13 → 2017-06-16Underwater operations in progress until further notice by M/V rambiz 300 in 53-05.0N 002-32.7ENorth Sea
- HYDROLANT 1834/172017-06-11 → 2017-07-02Survey operations in progress until further notice by M/V wg amundsen in area bound by 59-00N 001-31E,…North Sea · Norway
- HYDROLANT 1758/172017-06-04 → 2017-06-05Underwater operations in progress until further notice by M/V rambiz 300 in 53-05.0N 002-32.7ENorth Sea
- HYDROLANT 1698/172017-05-31 → 2017-06-01Survey operations in progress until 010400Z jun by M/V geosurveyor XI in vicinity of trackline between…North Sea
- HYDROLANT 1697/172017-05-31 → 2017-05-31Survey operations in progress until 311900Z may by M/V aquadynamic in vicinity of trackline between 51-20N…North Sea
- HYDROLANT 1656/172017-05-26 → 2017-05-30Survey operations in progress by M/V geosurveyor XI along trackline joining 51-19.6N 001-45.6E and 51-19.4N…North Sea · England · France
- HYDROLANT 1480/172017-05-10 → 2017-06-05Underwater operations in progress until further notice by barge taklift 4 in 53-05.0N 002-32.7ESouthern North Sea
- HYDROLANT 1439/172017-05-06 → 2017-05-07Underwater operations in progress until further notice by barge taklift 4 in 53-05.0N 002-32.7ESouthern North Sea
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts and your national MSI service.