This United States Army publication, Field Manual FM 90-5 Jungle Operations August 1982 describes: The Jungle Environment; Life in the Jungle; Preparation and Training to Deploy to Jungle; The Threat in Jungle Areas; Tactical Operations; Helicopter, Armor, Mechanized Infantry, And Combat Support Operations; and Combat Service Support. It has appendixes which cover: References; Navigation and Tracking; Jungle Obstacles; Waterborne Operations; Fighting Positions and Shelters; NBC Warfare in Jungle Areas; Communication Techniques in a Jungle Environment; The Individual Soldier's Combat Load; Adjustment of Indirect Fire by Sound; and Defensive Formations.