The fuels that the Aviation Boatswain Mate (Fuels) will most commonly work with are motor gasoline (MOGAS) and jet propulsion (JP). Because of the complexity and hazards of handling fuels, all personnel must be fully knowledgeable of their characteristics and operating qualities. We will discuss the properties of gasoline and jet propulsion fuels so that you can understand the need for safety and caution in handling them. We will also discuss quality surveillance and the test equipment used to ensure the delivery of a clean product. LEARNING OBJECTIVES: When you have completed this chapter, you will be able to do the following: 1. Describe the characteristics of the fuels commonly handled by the Aviation Boatswain Mate Fuels. 2. Describe the problems caused by fuel contamination. State the types and limits of fuel contaminants. 3. Describe the specific types of fuel samples taken by the ABF and explain proper sampling procedures.