chapter 2 industry characterization to accurately assess the potential impact of this emission control program it is important understand nature affected industries describes relevant background information related each categories engines and vehicles subject proposal for engine category descriptions supply demand sides markets are provided additionally organization historical market trends data discussed 1 ci marine recreational boats section gives a general segments that may be by regulation affect diesel contain these we therefore focus on compression ignition manufacturing boat building also several spark vessel even though they not directly rule vessels separate proposed rulemaking regarding evaporative emissions see 67 fr 53050 august 14 2002 was developed in part under contract with icf consulting as well independent analyses conducted epa through interaction