A process to determine the aggressiveness of a particular industry. Uses contrarotating propeller drives as an example and graphically portrays the increasing intensity of innovations in this area.
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Promotes the concept of learning from previous recreational conflict research surrounding snowmobiles an cross country skiers,
snowmobiles and ski touring, canoeist and motor boat users, hikers and mountain bikers, water skiers and fisherman and trying to apply the successful methods to this situation.
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