This unit of competency describes the outcomes required to assess, plan and safely carry out manual tree-felling operations using a chainsaw. This unit covers the felling procedures for trees with a level of complexity that requires significant tree assessment and practical felling skills. Persons competent in this unit should be able to effectively fell most trees except very large trees, and/or those with significant defects and/or characteristics that cause excessive complexity. It applies to trees that have a diameter greater than the bar length of the chainsaw.