Ferno VLS (Viper Loading System) is an ergonomic loading and unloading system and stretcher lock for Ferno VIPER ambulance stretcher. Ferno VLS is an easy-to-handle and flexible system that allows you to load the stretcher from varying angles and heights in less than 20 seconds. VLS will automatically center the stretcher before loading. VLS is one of the lightest systems on the market, which gives a lower total weight in the ambulance. VLS is a stable and ergonomic, mechanical construction with a built-in smart charge for the VIPER stretcher.