Marks clearly specified softwood and hardwood trees for cutting as sawlogs, pulpwood, posts, poles, etc., according to prescriptions. Measures tree diameters and heights and observes defects under guidance of supervisor. Traverses proposed timber sale units using plans and prescriptions, topographic maps, aerial photos, compass, Global Positioning System devices, etc. Assists in the lay out of logging units, temporary roads, locations, etc. As a member of a timber cruising crew, runs compass lin