28 Jan 2020 Categories: Safety Guides FISA 506 Extraction by horse This leaflet covers the extraction of timber using horse and chains (snigging), or horse and simple skidding units and forwarders in forestry and other tree work. Documents to download FISA 506 Extraction by Horse.pdf(.pdf, 344.3 KB) Previous Article FISA 601 Next Article FISA 602 Print