In order to meet the requirements of the European Water Framework Directive (EU-WFD). authorities face the problem of repeatedly performing area-wide surveying of all kinds of inland waters. Especially for mid-sized or small rivers this is a considerable challenge imposing insurmountable logistical efforts and costs. It is therefore investigated if large-scale surveying of a river sys... https://lockdownsecuritycanada.shop/product-category/extension-cable/