2019_001_HKZ_I_II_Backscatter_Data dataset https://portal.medin.org.uk/portal/start.php?tpc=010_f9c2648f54d452d0b99debd3880ba069 Bibby HydroMap were commissioned in February 2019 by Vattenfall Wind Power Limited to undertake a geophysical survey of the Hollandse Kust Zuid I and II Offshore Wind Farms (HKZWFZ I and II). The HKZWFS I covers an area of 67.2 km2, although the effective area available for HKZWFS I is 56.5 km2 when the maintenance zones for infrastructure (active cables and one planned telecom cable) are included. HKZWFS II covers an area of 47.7 km2. There is no active existing or planned infrastructure crossing the site. The Luchterduinen Wind Farm, commissioned late 2015 and operated by Dutch energy company Eneco, is located within the HKZWFZ. The 129 MW wind farm consists of 43 Vestas 3 MW V112 turbines, each with a tip height of 137 m. The objective of the survey was to acquire high resolution survey data to enable the development and construction of Hollandse Kust (Zuid) Wind Farm Sites. The survey data consisted of high-resolution geophysical data (including UXO survey) within specified areas around each proposed WTG location. Additionally, high resolution geophysical data was also acquired along proposed Inter Array Cable (IAC) routes. The survey is part of an overall strategy to reduce the UXO risk to ALARP, and to obtain detailed seabed data for engineering purposes. The survey is designed to provide information needed primarily for the following: - UXO survey for site clearance prior to construction - High resolution data set for engineering purpose and seabed mobility assessment prior to installation of wind farm assets 20200331 20200131